multiple choice (3 points each)
identify the choice that best completes the statement or answers the question.

1. what is the family name of group 17?
a. halogens
b. noble ases
c. alkali metals
d. transition metals

2. who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
a. henry moseley
b. j.j. thomson
c. john dalton
d. dmitri mendeleev

3. of the elements ca, ag, s, and k, which is a nonmetal
a. ca
b. s
c. ag
d. k

4. to what category of elements does an element belong if it is a good conductor of electricity?
a. transition elements
b. metalloids
c. nonmetals
d. metals

5. how does atomic radius change as you move down a group in the periodic table?
a. it tends to decrease
b. it tends to increase
c. it remains the same
d. first it increases, then it decreases

6. which element has the highest electronegativity value?
a. cesium
b. sulfur
c. chlorine
d. silver

7. as you move from left to right across a period of the periodic table ______.
a. ionization energy increases
b. atomic radii increase
c. electronegativity decreases
d. atomic mass decreases

8. an unidentified element has many of the same physical and chemical properties as sodium and rubidium but has a lower atomic mass than either of these elements. what is most likely the identity of this element?
a. hydrogen
b. lithium
c. francium
d. magnesium

9. which element is most likely to ionize by losing two electrons?
a. strontium
b. chlorine
c. sulfur
d. potassium

Question

multiple choice (3 points each)
identify the choice that best completes the statement or answers the question.

1. what is the family name of group 17?
   a. halogens
   b. noble ases
   c. alkali metals
   d. transition metals

2. who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
   a. henry moseley
   b. j.j. thomson
   c. john dalton
   d. dmitri mendeleev

3. of the elements ca, ag, s, and k, which is a nonmetal
   a. ca
   b. s
   c. ag
   d. k

4. to what category of elements does an element belong if it is a good conductor of electricity?
   a. transition elements
   b. metalloids
   c. nonmetals
   d. metals

5. how does atomic radius change as you move down a group in the periodic table?
   a. it tends to decrease
   b. it tends to increase
   c. it remains the same
   d. first it increases, then it decreases

6. which element has the highest electronegativity value?
   a. cesium
   b. sulfur
   c. chlorine
   d. silver

7. as you move from left to right across a period of the periodic table ______.
   a. ionization energy increases
   b. atomic radii increase
   c. electronegativity decreases
   d. atomic mass decreases

8. an unidentified element has many of the same physical and chemical properties as sodium and rubidium but has a lower atomic mass than either of these elements. what is most likely the identity of this element?
   a. hydrogen
   b. lithium
   c. francium
   d. magnesium

9. which element is most likely to ionize by losing two electrons?
   a. strontium
   b. chlorine
   c. sulfur
   d. potassium

Accepted Answer

### Question 1
# Brief Explanations:
Group 17 elements in the periodic table are known as Halogens. Noble gases are group 18, Alkali Metals are group 1, and Transition Metals are in the d - block. So the correct choice is a.
# Answer:
a. Halogens

### Question 2
# Brief Explanations:
Dmitri Mendeleev arranged elements by atomic mass and predicted properties of missing elements. Henry Moseley worked with atomic number, J.J. Thomson discovered electrons, and John Dalton proposed atomic theory. So the correct choice is d.
# Answer:
d. Dmitri Mendeleev

### Question 3
# Brief Explanations:
Ca (Calcium), Ag (Silver), and K (Potassium) are metals. S (Sulfur) is a non - metal. So the correct choice is b.
# Answer:
b. S

### Question 4
# Brief Explanations:
Metals are good conductors of electricity. Transition elements are a type of metal, metalloids have intermediate conductivity, and non - metals are poor conductors. So the correct choice is d.
# Answer:
d. metals

### Question 5
# Brief Explanations:
As we move down a group in the periodic table, the number of electron shells increases. This leads to an increase in atomic radius. So the correct choice is b.
# Answer:
b. It tends to increase

### Question 6
# Brief Explanations:
Electronegativity generally increases across a period and decreases down a group. Chlorine is more electronegative than Cesium, Sulfur, and Silver. So the correct choice is c.
# Answer:
c. Chlorine

### Question 7
# Brief Explanations:
As we move from left to right across a period, ionization energy increases (because effective nuclear charge increases), atomic radii decrease, electronegativity increases, and atomic mass generally increases. So the correct choice is a.
# Answer:
a. ionization energy increases

### Question 8
# Brief Explanations:
Sodium (Na) and Rubidium (Rb) are in group 1 (alkali metals). Lithium (Li) is also in group 1, has similar properties, and a lower atomic mass than Na and Rb. Hydrogen is not an alkali metal, Francium has a higher atomic mass than Rb, and Magnesium is in group 2. So the correct choice is b.
# Answer:
b. Lithium

### Question 9
# Brief Explanations:
Strontium (Sr) is in group 2. Group 2 elements tend to lose 2 electrons to achieve a stable electron configuration. Chlorine (Cl) gains electrons, Sulfur (S) gains electrons, and Potassium (K) loses 1 electron. So the correct choice is a.
# Answer:
a. Strontium

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