Elements, Compounds, and Mixtures Test

are the electrons found in the outer shell of an element

• valence electrons

• electrons

• protons

• ions

is made up of neutrons, protons, and electrons

• ion

• atom

• element

• compound

Tags

NGSS.MS-PS1-1

You can tell how many electron shells an element has by which period it is in

• True

• False

How many electrons can go on the 1st shell? (write the number)

How many electrons can go on the 2nd shell? (write the number)

smallest unit of life

• compound

• element

• atom

• molecule

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

are formed when an atoms loses or gains one or more electrons

• ion

• anion

• cation

• molecule

a neutral atom will become a ____ if it loses one or more electrons

• anion

• cation

• ion

• element

forms if it gains one or more electrons

• anion
• neutron
• cation
• proton

Who discovered protons, neutrons, and electrons?