Ions - practice 1

Which of the following elements will form a cation?

• Arsenic

• Copper

• Bromine

• Fluorine

Which of the following will form an anion?

• Titanium

• Iron

• Calcium

• Sulfur

Which of the following will form an anion?

• Tin

• Lead

• Chlorine

• Zinc

Which of the following elements will form an anion?

• Calcium

• Cobalt

• Nickel

• Iodine

Which of the following will form an anion?

• Oxygen

• Cobalt

• Strontium

• Cesium

Electrons repel each other and move frantically in their shells because

• Their positive charges repel

• Their negative charges attract

• Their negative charges repel

• Their positive charges attract

An ion is

• Also a compound

• An atom that has gained or lost an electron

• An atom that has only gained electrons

• An atom where the number of protons=electrons

Describe the anion S^2-

• Silicon that gained 2 electrons

• Sulfide that gained 2 electrons

• Sulfur that gained 2 electrons

• Strontium that gained 2 electrons

Iodide

• I ^–

• IO ^–

• I ^2–

• I₂

Oxide

• O ^-

• O₂

• O ^3-

• O ^2-