Ions

Cations are...

• Positive

• Negative

• Neutral

• Purring

Anions are...

• Positive

• Negative

• Neutral

• Crying

Why are ions formed?

• To make our lives difficult

• Because atoms want to be stable with 8 valence electrons

• Because atoms have the same number of protons and electrons

• Because atoms gained neutrons

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

• +2

• -2

• +3

• 0

How many protons, neutrons, and electrons?

• proton = 6, neutron = 4, electron = 1

• proton = 4, neutron = 4, electron = 5

• proton = 1, neutron = 6, electron = 10

• proton = 4, neutron = 2, electron = 3

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

Ions are: 

• atoms with a positive or negative charge

• atoms with no charge

• atoms with ONLY a positive charge

• atoms with ONLY a negative charge

If an element has 3 valence electrons, what charge will likely form on its ion ?  Hint:  It will lose those electrons.  What happens to the charge when it loses 3 electrons?

• +3

• +5

• -3

• -5

Atoms are most stable when their outer shell is filled with electrons.

• true

• false

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

• -1

• -2

• +1

• +2