​Periodic Table

• 20 All Zinc atoms have (how many?) ____ protons.

• 21 If a Copper atom has no charge (neutral), it would contain (how many?) _____ electrons.

• 22 All atoms that have 14 protons are (what element?) ________.

• 23 If an atom of Zinc has a mass of 64, it has (how many?) ______ neutrons.

• 24 Silver-108 has a mass of 108. This means that it would have (how many?) ____ neutrons with its 47 protons.

​Periodic Table

• 25 Na (Sodium) has (how many?) _____ protons and (how many?) _____ neutrons for a total mass of 23.

• 26 A -1 ion of Bromine would have _____ protons and _____ electrons.

• 27 A +2 ion of Calcium would have _____ protons and _____ electrons.

• 28 To form an ion with a -2 charge, an atom of Sulfur would need to have _____ electrons.

• 29 A neutral atom of Zinc-66 has _____ protons, _____ neutrons, and _____ electrons.​