Ions

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

• -1

• -2

• +1

• +2

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

• -1

• -2

• +1

• +2

How many total electrons does O^-2 (an oxide ion) have?

• 8

• 10

• 6

• 18

How many total electrons does Mg⁺² (a magnesium ion) have?

• 10

• 12

• 14

• 22

How many total electrons does Na⁺¹ (a sodium ion) have?

• 10

• 11

• 12

• 22

Cations are

• positive

• negative

• on the right side of the periodic table.

• nonmetals

How many electrons are in a Li⁺ ion?

• 1

• 2

• 3

• 4

How many electrons are in an S^2- ion?

• 10

• 14

• 16

• 18

How does a Br atom form a Br^- ion?

• A bromine atom loses an electron.

• A bromine atom gains and electron.

• A bromine atom loses a proton.

• A bromine atom gains a proton.

Which is the correct symbol for the element with 8 protons and 10 electrons?

• N^3-

• O^2-

• O^3-

• F^-