Question

o 15.999 atomic # = __ atomic mass = # of protons = # of neutrons = # of electrons = zinc 65.39 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = li 6.941 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = silicon 28.086 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = b 10.81 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = bromine 79.904 atomic # = atomic mass = # of protons = # of neutrons = # of electrons = __

Explanation:

Step1: Recall atomic number facts

Atomic number = number of protons = number of electrons in a neutral atom.

Step2: Recall neutron - proton relationship

Number of neutrons = Atomic mass (rounded to nearest whole number) - Number of protons.

Oxygen (O)

Atomic number = 8
Atomic mass = 15.999 ≈ 16
Number of protons = 8
Number of neutrons = 16 - 8=8
Number of electrons = 8

Zinc (Zn)

Atomic number = 30
Atomic mass = 65.38 ≈ 65
Number of protons = 30
Number of neutrons = 65 - 30 = 35
Number of electrons = 30

Lithium (Li)

Atomic number = 3
Atomic mass = 6.941≈7
Number of protons = 3
Number of neutrons = 7 - 3 = 4
Number of electrons = 3

Silicon (Si)

Atomic number = 14
Atomic mass = 28.086≈28
Number of protons = 14
Number of neutrons = 28 - 14 = 14
Number of electrons = 14

Boron (B)

Atomic number = 5
Atomic mass = 10.81≈11
Number of protons = 5
Number of neutrons = 11 - 5 = 6
Number of electrons = 5

Bromine (Br)

Atomic number = 35
Atomic mass = 79.904≈80
Number of protons = 35
Number of neutrons = 80 - 35 = 45
Number of electrons = 35

Answer:

Oxygen:
Atomic number = 8
Atomic mass = 15.999
Number of protons = 8
Number of neutrons = 8
Number of electrons = 8

Zinc:
Atomic number = 30
Atomic mass = 65.38
Number of protons = 30
Number of neutrons = 35
Number of electrons = 30

Lithium:
Atomic number = 3
Atomic mass = 6.941
Number of protons = 3
Number of neutrons = 4
Number of electrons = 3

Silicon:
Atomic number = 14
Atomic mass = 28.086
Number of protons = 14
Number of neutrons = 14
Number of electrons = 14

Boron:
Atomic number = 5
Atomic mass = 10.81
Number of protons = 5
Number of neutrons = 6
Number of electrons = 5

Bromine:
Atomic number = 35
Atomic mass = 79.904
Number of protons = 35
Number of neutrons = 45
Number of electrons = 35