Atoms, Elements, Molecules

______ are the building blocks of matter.

• Element

• Compound

• Atoms

• Molecules

Tags

NGSS.MS-PS1-1

A ______ is made of 2 or more bonded atoms.

• compound

• atoms

• element

• molecule

Tags

NGSS.MS-PS1-1

A pure substance that cannot be separated into a simpler substance by physical or chemical means is an _________.

• element

• atom

• compound

• molecule

A pure substance composed of two or more different elements joined by chemical bonds is a _______.

• atom

• compound

• molecule

• element

Tags

NGSS.MS-PS1-1

Which subatomic particle has the most mass?

• proton

• electron

• nucleus

• neutron

Which subatomic particle determines the identity of an atom?

• proton

• neutron

• electron

• nucleus

Protons have a _________ charge.

• neutral

• negative

• positive

Neutrons have a _______ charge.

• Positive

• Neutral

• Negative

Electrons have a ________ charge.

• negative

• positive

• neutral

Tags

NGSS.MS-PS2-3

If you consider the space of an atom, it is _______.

• half filled, half empty

• mostly filled

• mostly empty space