Ions & Periodic Table Trends

• 8

• 10

• 9

• 6

Which of the following are properties of ions?

• reactive

• attracted or repulsed by other charged particles

• deflected by a magnetic field

• all of the above

Positively charged ions are called ______

Negatively charged ions are called _________

An iodine atom has 53 protons. How many electrons does an iodine anion have?

• at least 54

• 53 or more

• 53 or less

• none of the above

What is the name of the ion represented by the following symbol:
0^2-

• oxygen ion

• dioxide

• oxide

• none of the above

How are most ions formed?

• High levels of radiation give outer electrons enough energy to escape from an atom.

• An atom picks up free electrons from the environment and adds them to the outermost shell.

• An atom spontaneously releases electrons.

• An atom transfers electrons to or from another atom or molecule.

Ions form because the loss of one or more electrons makes them less stable than their corresponding atoms; this state requires more energy to maintain.

• True

• False

The process in which an atom becomes an ion is called _________

If an atom gains or loses electrons, it becomes a(n) _____________.