Elements and Compounds

What particle is the basic unit of ALL matter?

• atom

• molecule

• cell

• compound

Tags

NGSS.MS-PS1-1

Which of the following correctly matches each subatomic particle with its electrical charge?

• proton - positive

  neutron - neutral

  electron - negative

• proton - negative

  neutron - positive

  electron - neutral

• proton - neutral

  neutron - negative

  electron - positive

Which of the following correctly pairs a particle with its location in the atom?

• proton - nucleus

• neutron - electron cloud

• electron - nucleus

Tags

NGSS.MS-PS1-1

The diagram shows a water molecule. Which statement best describes water.

• It is a compound, made by chemically bonding hydrogen atoms to an oxygen atom.

• It is an element, made up of only one type of atom.

Tags

NGSS.MS-PS1-1

An element's atomic number is equal to:

• the number of protons

• the number of neutrons

• the mass of the atom

The number with a decimal (32.065) represents the:

• element name

• chemical symbol

• atomic number

• atomic mass (weight)

How many different elements are in the compound sodium phosphate (Na₃PO₄)?

• 3

• 4

• 8

• 9

Tags

NGSS.MS-PS1-1

How many atoms are in one molecule of methane?

• 1

• 2

• 4

• 5

Tags

NGSS.MS-PS1-1

The center of an atom (where the protons and neutrons are located) is known as the:

• nucleus

• electron cloud

• chemical bond

Tags

NGSS.MS-PS1-1

Which of the following describes elements that are metals? Choose all correct answers.

• shiny

• brittle

• good conductors of heat

• good conductors of electricity