Question

atomic basics
part a: atomic structure

1. draw five protons in the nucleus of the atom. label them with their charge.
2. draw six neutrons in the nucleus of the atom.
3. draw two electrons in the first energy level and label them with their charge.
4. draw three electrons in the second energy level and label them with their charge.
5. what element is represented by the diagram? boron

part b: atomic calculations

1. label the information provided in the periodic - table:

s
o
oxygen
15.999
atomic number
element symbol
element name
atomic mass

1. what does the atomic number represent? protons or electrons
2. what does the atomic mass represent? protons + neutrons
3. how would you figure the number of protons or electrons in an atom? atomic number
4. how would you figure the number of neutrons in an atom?
5. use your knowledge of atomic calculations to complete the chart.

element atomic number atomic mass protons neutrons electrons
li 3 7 3 3 3
p 15 31 15 16 15
cl 17 35 17 18 17
ni 28 59 28 31 28
k 19 39 19 20 19
ag 47 107 47 60 47
h 1 1 1 0 1
si 14 28.09 14 14 14
w 74 183 74 109 74
ne 10 20

Explanation:

Step1: Recall atomic number concept

The atomic number represents the number of protons in an atom. It also equals the number of electrons in a neutral atom.

Step2: Recall atomic mass concept

The atomic mass is the sum of the number of protons and neutrons in an atom.

Step3: Determine number of protons/electrons

The number of protons or electrons in an atom is equal to the atomic number of the element.

Step4: Determine number of neutrons

The number of neutrons in an atom is calculated as: Atomic Mass - Atomic Number.

Answer:

1. Symbol: O, Element Name: Oxygen, Atomic Mass: 15.999
2. The atomic number represents the number of protons (or electrons in a neutral atom).
3. The atomic mass represents the sum of protons and neutrons.
4. The number of protons or electrons is equal to the atomic number.
5. The number of neutrons = Atomic Mass - Atomic Number.

11.

Element	Atomic Number	Atomic Mass	Protons	Neutrons	Electrons
P	15	31	15	16	15
Cl	17	35	17	18	17
Ni	28	59	28	31	28
K	19	39	19	20	19
Ag	47	107	47	60	47
H	1	1	1	0	1
Si	14	28.09	14	14.09 (approx 14)	14
W	74	183	74	109	74
Ne	10	20	10	10	10