Atoms and Ions Worksheet

Name: ______Date: ______

Period: ___ 2; ___ 3; ___ 4; ___ 6; ___7; ___ 8

Atoms Worksheet

Fill in the missing spaces in the charts below.

Remember, the atomic number is the number of protons contained in an element. The number of protons must equal the number of electrons to have a stable form of the element.

To calculate the number of neutrons, subtract the atomic number, the number of protons, from the mass number.

Element / Atomic Number / Mass Number / Protons / Neutrons / Electrons
Carbon / 6 / 14
Oxygen / 8 / 10
Potassium / 19 / 20
Potassium / 19 / 41
Gold / 79 / 197
Tin / 50 / 68
Zinc / 64 / 30
Zinc / 66 / 30
Zinc / 68 / 30
Cobalt / 27 / 32
Boron / 5 / 6
Boron / 10 / 5
Iron / 26 / 56
Iron / 26 / 28

Name: ______Date: ______

Period: ___ 2; ___ 3; ___ 4; ___ 6; ___ 7; ____8

Ions Homework #1

Remember, the atomic number is the number of protons contained in an element. The number of protons must equal the number of electrons to have a stable form of the element.

To calculate the number of neutrons, subtract the atomic number, the number of protons, from the mass number.

Ionic form of the elements are depicted with a “+” or a “-” charge. Remember, the + charge depicts a loss of electrons and a – charge depicts a gain of electrons.

Ion / Symbol / Atomic Number / Mass Number / Protons / Neutrons / Electrons
Iodine / I-1 / 127 / 53 / 54
Chlorine / Cl-1 / 35 / 17
Hydrogen / H / 1 / 1 / 0
Bromine / Br-1 / 35 / 46
Bromine / Br-1 / 35 / 79 / 36
Boron / B+3 / 5 / 11
Oxygen / O-2 / 16 / 8
Nitrogen / N-3 / 7 / 7 / 10
Aluminum / Al+3 / 27 / 10
Iron / Fe+2 / 56 / 26 / 24
Copper / Cu+1 / 29 / 34
Copper / Cu+2 / 63 / 29 / 27