Atomic Structure

A substance that cannot be chemically broken down into a simpler substance.

• atom

• element

• molecule

• compound

Negatively charged sub-atomic particle found outside the nucleus.

• proton

• neutron

• electron

• nucleus

An energy level can also be referred to as an electron ____.

• symbol

• formula

• shell

• molecule

Tags

NGSS.HS-PS1-1

A bond formed when atoms trade electrons.

• ionic bond

• covalent bond

Tags

NGSS.HS-PS1-2

In an uncharged atom, the number of electrons is ____ to the number of protons.

Sub-atomic particles in the nucleus that lack an electrical charge.

• proton

• neutron

• electron

The building blocks of matter.

• atoms

• elements

• compounds

• molecules

Tags

NGSS.MS-PS1-1

The second and third energy levels of an atom can hold up to ____ electrons.

When an atom gains or loses an electron, it becomes a charged ____.

Electrons are found in _____ levels.

Tags

NGSS.HS-PS1-1