Unit 3: Matter

What is the smallest unit of matter that makes up an element?

• An element

• An atom

• A compound

• A molecule

How many electrons can the THIRD energy level of an atom hold?

• 2

• 8

• 18

• 20

How many electrons can the SECOND energy level of an electron hold?

• 2

• 8

• 18

• 20

How many electrons can the FIRST energy level of an atom hold?

• 2

• 8

• 18

• 20

What is the abbreviation of an element's name that represents an element on the periodic table? This is either 1 or 2 letters and the first letter is always capitalized.

• Element name

• Atomic number

• Element symbol

• Atomic mass

What is the average mass of all of the isotopes of an element? (This is the number with the decimal on the periodic table.)

• Atomic number

• Element name

• Element symbol

• Atomic mass

_______________ is the number that indicates the number of PROTONS found in an atom. (This number does NOT have a decimal.)

• Atomic Mass

• Atomic Number

• Element Name

• Element Symbol

What is the region surrounding the nucleus where the electrons can be found?

• Nucleus

• Atom

• Electron cloud

• Nothing

What is the "center" of an atom called?

• Electron Cloud

• Nucleus

• Atomic center

• Mass

Which subatomic particle is found in the nucleus of an atom and is neutral?

• Proton

• Neutron

• Electron

• Nucleus