Unit 1 Atoms and the Periodic Table

The smallest particle of an element that still has the properties of that element is called a(n) _____________.

• proton

• neutron

• electron

• atom

What do protons and neutrons have in common?

• They both have a charge of +1

• They both have no charge (neutral)

• They both have a mass of 1 amu

• They both have no mass

What is an ion?

• An atom that has a positive charge because it has gained electrons.

• An atom of an element with a different number of neutrons

• An atom that has a negative charge because it has lost electrons.

• An atom that has a positive or negative charge because it has lost or gained electrons.

What happens to a neutral atom when it loses an electron?

• It becomes a positive ion

• It becomes a negative isotope

• It becomes a negative ion

• It becomes a neutral ion

How many protons does potassium have?

• 19

• 39

• 39.098

• 20.098

How many electrons does a neutral atom of Boron have?

• 6

• 10.811

• 5.811

• 5

Which group and period is Oxygen (O) in?

• Group 16, Period 1

• Group 16, Period 2

• Group 2, Period 16

• Group 6, Period 1

Which family of elements has 7 valence electrons?

• Transition Metals

• Noble Gases

• Halogens

• Alkali Metals

The horizontal rows on the periodic table are called ______.

• Groups

• Periods

• Columns

• Valence

What is the GREATEST number of valence electrons an atom can have?

• 0

• 2

• 8

• 18