Chem PT 1/31

An atom becomes _________ when it gains electrons.

• Positive
• Negative
• Neutral
• Invinsible

An atom becomes _______ when it loses electrons.

• Positive
• Negative
• Neutral
• Invinsible

An atom with 2 protons, 3 neutrons, and 4 electrons has a charge of ____.

• +2

• -2

• +3

• 0

A Bromine ion gains 1 electron, which of the following is the correct symbol for a Bromine ion?

• Br^-1

• Br⁺¹

• Br⁺⁷

• Br^-7

What is the charge of an atom that has lost one electron?

• -1
• -2
• +1
• +2

Which is an electron?

• A
• B
• C

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

• 3

• 4

• 5