Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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33. what type of chemical bonding is shown in the picture below? k⁺ ··b…
(33) Ionic bonding (34) Covalent bonding (35) Oxygen; hydrogen (36) Polar (37) Hydrogen (38) 4 (39) Cohesion (40) Surface - tension (41) Adhesion (42) Capillary action (43) Cohesi…
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how many valence electrons does this atom have? * p: 33 n: 42
5
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what is the period number of this atom? * p: 33 n: 42
4
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what is the group number of this atom? * what is the period number of t…
15
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what is the atomic number of this atom? * p: 33 n: 42 33
33
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investigation 4 physical properties of materials the peak of mount ever…
1. Ice: Lower density (floats), melting point of 0°C due to open - lattice hydrogen - bonded structure. Water: Higher density, liquid at room temperature, high surface tension due…
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what is the atomic mass number of this atom? * your answer! this is a r…
75
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13. name some properties of the noble gases group.
Unreactive, colorless, odorless, tasteless gases at standard conditions, full outer - electron shell.
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31. use the diagram below to identify a and b and either covalent bondi…
(31) A: Covalent bonding; B: Hydrogen bonding (32) | Property | Description/Definition | Example in the Real World | |--|--|--| | Cohesion | The attraction between molecules of th…
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6. the solubility of oxygen gas is 0.007 g/100 ml at stp conditions. ho…
a. 0.007 g b. 0.007 g c. 0.021 g
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a chemical engineer is studying the rate of this reaction. 2so₃(g)→2so₂…
1. **Half - life**: - From the graph, if the initial concentration of $\text{SO}_3$ is around $0.10\ M$, the time when it reaches $0.05\ M$ is approximately $t_{1/2}=0.69\ s$ (rou…
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20. where are the most reactive elements? a. groups 1a and 2a b. groups…
(20) b. Groups 1A and 7A (21) d. the noble gases (22) d. hydrogen (23) c. 1000 (24) covalent (25) positive (26) negative (27) negative (28) ionic (29) b. polar (30) c. metal and a…
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this statue of leshan giant buddha in sichuan, china, is carved directl…
B. rainfall and chemical reaction
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suppose y = f(x) graphed in the figure below represents the cost of man…
(a) $(0,0)$ and $(4,f(4))$ (b) $<$
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use the drop - down menus to describe the behavior of elements in group…
First drop - down: gain 1; Second drop - down: lose 2
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drag the correct label to each event. each label can be used more than …
1. chemical weathering 2. mechanical weathering 3. chemical weathering 4. chemical weathering
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which is the correct formation of potassium chloride?
The correct formation is $[K]^+[Cl:]^-$ (the first option shown in the image).
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11. the horizontal rows of the periodic table are called a. groups c. f…
(11) b. Periods (12) c. the number of electron orbitals/shells (13) a. Groups (14) d. the number of valence electrons in the group (15) Cannot be determined without element - key …
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11. the text says \the periodic table is read like a book\. why is a bo…
Because both are read in a left - to - right and top - to - bottom order which helps in understanding patterns and sequences, in the case of a book for the story or information fl…
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question 8 (4 points) balance the following reaction in a basic solutio…
$4Ag(s)+O_{2}(g)+2H_{2}O(l)\to 2Ag_{2}O(s)+4OH^{-}(aq)$
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54) when an atom gains electrons, it is a) reduced b) oxidized c) ionic…
A. reduced
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5. for each of the following, determine whether the statement is true o…
a. False. A saturated solution of NaCl(s) cannot be filtered to remove the dissolved solute. b. True c. False. Pressure is a major factor only in the solubility of gases in water,…
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10. where on the periodic table would you look to find the group number?
At the top of each vertical column.
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a chemist is using 361 milliliters of a solution of acid and water. if …
$52.3$
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56) which of the following is not true about the unique properties of w…
B. It has a low specific heat.
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10) krypton (kr) 11) zinc (zn) 12) oxygen (o)
10) Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶ Noble Gas Configuration: [Ar]4s²3d¹⁰4p⁶ 11) Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰ Noble Gas Configuration: [Ar]4s²3d…
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the chemical equation for burning paper, or cellulose, is c₆h₁₀o₅ + 6o₂…
The reactants ($C_6H_{10}O_5$ and $O_2$) have more potential energy stored in their bonds than the products ($CO_2$ and $H_2O$) because the reaction is exothermic and the products…
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7) germanium (ge) electron configuration: noble gas configuration: 8) s…
7) Germanium (Ge): - Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{2}$ - Noble Gas Configuration: $[Ar]4s^{2}3d^{10}4p^{2}$ 8) Sulfur (S): - Electron Con…
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questions 1. lets say that you have two bottles on the shelf. both labe…
1. Use silver nitrate solution. $NaCl(aq)+AgNO_3(aq) ightarrow AgCl(s)+NaNO_3(aq)$ (white precipitate), $NaI(aq)+AgNO_3(aq) ightarrow AgI(s)+NaNO_3(aq)$ (yellow precipitate). 2. A…
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what mass of helium (in g) does the balloon contain? 11.45 a 1.007 g sa…
The molar mass of the gas is approximately $56.9\text{ g/mol}$
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4) titanium (ti) electron configuration: ____________ noble gas configu…
4) Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d² Noble Gas Configuration: [Ar]4s²3d² 5) Electron Configuration: 1s²2s²2p⁶3s²3p³ Noble Gas Configuration: [Ne]3s²3p³ 6) Electron Con…
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physical properties of materials the peak of mount everest is 8,848 met…
1. Ice: Lower density (floats) due to hexagonal lattice structure; hard and brittle. Water: Liquid at room - temp, high surface tension due to hydrogen - bonding. 2. Identify cand…
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9. how do you determine the number of valance electrons that an element…
For main - group elements, use the group number. For transition metals, it's more complex involving s and some d electrons.
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the model shows the trend of electronegativity in the periodic table. u…
Fluorine; highest electronegativity
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11) which of the following is not a molecule? a) o₃ b) o₂ c) c d) dna e…
C. C
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the relationship among atoms, elements, and compounds is most like the …
A. bricks, brick houses, and large brick buildings
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drag and drop the elements to order them from largest atomic radius to …
Iodine, Bromine, Chlorine, Fluorine
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8) ____ is an example of something that has a basic ph. a) tomato juice…
B. Ammonia
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27. adding an acid to a solution a) increases, neutralize b) increases,…
B. Increases, decreases
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1) beryllium (be) electron configuration: noble gas configuration: 2) s…
1) Electron Configuration: $1s^{2}2s^{2}$; Noble Gas Configuration: $[He]2s^{2}$ 2) Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}$; Noble Gas Configuration: $[Ne]3s^{2}3…
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anchoring phenomenon inquiry launch preparing and cooking foods involve…
- What is the freshness level of each ingredient? - What is the ideal cooking temperature for this meat? - How long should I cook this vegetable to retain nutrients? - How large s…
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8. what are valance electrons?
Valence electrons are the electrons in the outermost shell of an atom and are involved in chemical bonding.
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electron configuration and orbital notation instructions: complete the …
Nitrogen: Electron Configuration: $1s^{2}2s^{2}2p^{3}$ Noble Gas Configuration: $[He]2s^{2}2p^{3}$ Fluorine: Electron Configuration: $1s^{2}2s^{2}2p^{5}$ Noble Gas Configuration: …
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electron configuration and orbital notation instructions: complete the …
**For Nitrogen**: Electron Configuration: 1s²2s²2p³ Electron Configuration (abbreviated): 1s²2s²2p³ Noble Gas Configuration (abbreviated): [He]2s²2p³ **For Fluorine**: Electron Co…
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which of the following is true of iron? a. it has the highest electrica…
B. It can exist in many alloys, usually with a carbon base.
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unit 2 atoms and the periodic table study guide vocabulary to know for …
1. d. protons 2. b. electrons 3. c. neutrons 4. a. Protons and electrons 5. The number of protons is equal to the atomic number of the element on the periodic table. 6. In a neutr…
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7. what do the elements found in the same group have in common?
Elements in the same group have the same number of valence electrons and similar chemical properties.
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question 7 (4 points) balance the following half - reaction in an acidi…
$HNO_2(aq)+H_2O(l)\to NO_3^-(aq)+3H^+(aq)+2e^-$
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6. where on the periodic table is a group found?
Groups are found as the vertical columns on the periodic table.
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which of the following is not true of silver? a. it has the highest ele…
C. It is a copper alloy, usually mixed tin as the main additive.
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question 6 (1 point) assign oxidation numbers to ch₃oh. c - h - o -
C -2, H +1, O -2
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question 5 (1 point) assign oxidation numbers to so₂. s - o -
S - +4, O - -2
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question 4 (1 point) assign oxidation numbers to agno₃. ag - n - o -
Ag - +1, N - +5, O - -2
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question 3 (1 point) why is a voltaic cell created in two separate beak…
To separate oxidation and reduction half - reactions and enable electron flow through an external circuit to generate electric current.
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3. where on the periodic table is a period found? a period is found as …
A period is found as a horizontal row on the periodic table.
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general knowledge matching match each of the items in the left column t…
1. L. Upper chambers of the heart 2. C. Blood vessels that supply blood to the myocardium 3. O. Electrical impulses slow here to allow blood to move from the atria to the ventricl…
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question 2 (1 point) if an atom gains electrons, why is it called a red…
When an atom gains electrons, its oxidation number decreases, which is why it is called a reduction.
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the correct name for h2so4 is a hydrosulfuric acid b sulfuric acid c hy…
B. sulfuric acid
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cardiovascular emergencies general knowledge matching match each of the…
1. L 2. C 3. O 4. G 5. N 6. K 7. H 8. M 9. B 10. D 11. F 12. I 13. J 14. A 15. E 16. P 17. G 18. E 19. F 20. C 21. A 22. D 23. B
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based on our discussion in class, at the molecular level, why is salt w…
Salt water contains dissolved salt ions that add mass to the same volume of water, increasing its density compared to fresh water.
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show all work!! (unit 4l frq) (3 points per question) 1. which element …
1. Lithium (Li) 2. Neon (Ne) 3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ 4. 5 5. Draw 5 dots around the symbol 'P'
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17. if a bottle of liquor is 80 proof, what % of alcohol does it contai…
17. B. 40% 18. C. Antibiotics
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an element that loses an electron, would have a ______ charge. positive…
A. positive
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what is the name for s²⁻? a sulfur b sulfide ion c sodium ion d sulfur …
B. sulfide ion
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1. ____ is the growing of crops for money on large farms with many mach…
1. C. Agribusiness 2. B. Brazil 3. D. cars 4. C. Chile 5. A. drugs
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the correct name for h₂so₄ is a sulfuric acid b hydrogen sulfate c hydr…
A. sulfuric acid
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question 1 (1 point) how can oxidation numbers help you determine a red…
Oxidation numbers help determine redox reactions by showing electron transfer through changes in their values. They are used instead of valence numbers when valence concepts are i…
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the name for cus is a copper sulfite b copper (ii) sulfide c copper sul…
B. copper (II) sulfide
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the correct formula for aluminum nitride is a al₂n₃ b aln c alno₃ d al₃…
B. AlN
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the acid hbr is called a bromous acid b hydrogen bromide c bromic acid …
D. hydrobromic acid
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give the name for n₂o₅ a dinitrogen pentoxide b dinitrogen tetroxide c …
A. dinitrogen pentoxide
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na3po4 is named as a sodium phosphide b sodium(iii) phosphate c sodium …
D. sodium phosphate
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what is the formula for carbon tetrachloride? a ccl4 b ccl3 c ccl d c4cl
A. CCl₄
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question 6 (5 points) what is the ph of a 0.340 mol/l solution of sodiu…
$pH = 8.3$
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8. if a balloon filled with water is cooled enough, the water inside wi…
When the water freezes, the amount of matter in the balloon will remain the same.
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question 5 (6 points) a buffer solution is made from 0.650 mol/l ammoni…
pH = 9.5
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question 4 (8 points) 150.00 ml of 1.50 mol/l methanoic acid is being t…
$pH = 2.80$
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7. when two substances react to form one new substance, the mass of the…
equal to the mass of the two substances combined.
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question 3 (6 points) what is the ph of 0.45 mol/l solution of hypochlo…
pH = 3.9
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what is the mass, in grams, of 63.0 moles of c? 756 grams 5.25 grams 12…
756 grams
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6. the mass of substances after a chemical reaction is _ the mass of th…
equal to
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5. how could we prove that gases are made of tiny particles? o we could…
We could blow up a balloon.
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question 2 (4 points) consider the following reaction: n₂(g) + 3h₂(g) ⇌…
C. $[N_2]=3.15$ M, $[NH_3]=3$ M
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robert frosts poetry on virtue mending wall on virtue by phillis wheatl…
# Breve explicación: "On Virtue" de Phillis Wheatley y "Mending Wall" de Robert Frost usan un lenguaje comprensible y común, es decir, lenguaje cotidiano. "On Virtue" no es verso …
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4. rafael notices that after the sugar investigation, the mass of the t…
Andre: "When the sugar changed, some of it left the tube as carbon dioxide gas."
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what is the electron configuration for na+? 1s²2s²2p⁶3s² 1s²2s²2p⁶ 1s²2…
$1s^{2}2s^{2}2p^{6}$
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what charge would an element be in group 13 most likely make? 0 +2 +1 +3
+3
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which element has an electron located in a \p\ orbital? c he be li
C. C
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n₂(g) + 2o₂(g) ⇌ 2no₂(g) k = 1.96 x initially, 0.45 mol/l of nitrogen a…
$[\text{N}_2]=0.44\ M$, $[\text{O}_2]=0.66\ M$, $[\text{NO}_2]=0.020\ M$
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your teacher places a clump of iron wool on the scale and lights it on …
The mass would stay the same before and after burning.
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how many electrons may occupy a d - sublevel? 8 14 6 10
D. 10
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using your periodic table, which of the following elements has the same…
A. germanium (Ge)
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2. where on the periodic table do the lighter elements appear? the heav…
Lighter elements appear towards the top - left of the periodic table. Heavier elements appear towards the bottom - right of the periodic table.
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2. which of the following correctly explains how atoms can be used to i…
Atoms rearrange and form new structures during a chemical reaction.
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a certain element has a ground - state electron configuration of 1s²2s²…
Y
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1. are made of particles that are too small to be seen by the human eye…
All types of matter
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which orbital diagram represents an atom in group 18? 1s ↑↓ 2s ↑ 1s ↑↓ …
The third option (the one with $1s$ $\uparrow\downarrow$ $2s$ $\uparrow\downarrow$ $2p$ $\uparrow\downarrow$ $\uparrow\downarrow$ $\uparrow\downarrow$)
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1. give examples of properties of elements that appear in a pattern on …
Atomic radius, ionization energy, electronegativity
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unit 4l test 25 - 26 a beryllium (be²⁺) cation has - gained two electro…
lost two electrons
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if fluorine gains one electron, we call it a/an neutral atom anions cat…
B. anions