Chapter 12 Vocab

The atomic number indicates

• The number of protons an atom has

• The number of neutrons an atom has

• The number of electrons an atom has

• The number of atoms found in an element

Periodic means

• Having a very irregular patterm

• Having a regular repeating pattern

• Element

• The element does not belong to any particular family or group

The horizontal rows on the periodic table are called

• Groups

• Halogens

• Periods

• Families

The vertical columns on the periodic table are called

• Groups

• Periods

• Families

• Metals

The periodic law says that

• physical and chemical properties of the elements happen in a repeating predictable way on the periodic table

• The elements have no similar physical or chemical properties

• The elements only sometimes share physical and chemical properties

• physical and chemical properties of the elements happen in a chaotic way on the periodic table

The periodic table has 9 main groups called

• Classes

• Families

• Periods

• Groups

Atomic mass is

• The number of protons an atom has

• The number of isotopes an atom has

• The weight of an atom

• The weighted average of all the isotopes of an element

Family that does not easily react with other elements

• Noble Gases

• Alkali Metals

• Alkaline earth metals

• Transition metals

elements that are all very reactive nonmetals

• Noble gases

• Alkali Metals

• The Carbon Group

• Halogens

Most reactive group

• Halogens

• Noble Gases

• Alkali metals

• Alkaline earth metals