Unit 5- Electrons & Periodic Table Vocabulary

Front

The sum of the protons and neutrons in an atom

Back

mass number

Front

Negatively charged ion formed by gaining electrons

Back

anions

Front

The mass of an atom as listed on the periodic table.

Back

atomic mass

Front

smallest particle of an element that retains the properties of the element

Back

atom

Front

Center of an atom

Back

nucleus

Front

Another name for a group of elements on the periodic table

Back

family

Front

Elements located along the "stairs" on the periodic table

Back

metalloids

Front

Elements that are shiny, solids, and good conductors of heat and electricity.

Back

metals

Front

State of matter

Back

Phase

Front

Family of elements located in group 1 on the periodic table

Back

alkali metals