Atomic Structure

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

Tags

NGSS.MS-PS1-1

What is a subatomic particle with a positive charge that is in the nucleus of an atom?

• neutron

• proton

• electron

• valence electron

Tags

NGSS.MS-PS1-1

What is a subatomic particle without an electric charge, located in the nucleus of an atom?

• neutron

• proton

• electron

• valence electron

What is a subatomic particle with a negative charge? It is found in the electron cloud surrounding the nucleus.

• neutron

• proton

• electron

• electron cloud

What is the system of electrons surrounding the nucleus of an atom?

• valence electrons

• nucleus

• electrons

• electron cloud

Tags

NGSS.MS-PS1-1

What is the center of an atom containing protons and neutrons?

• nucleus

• neutron

• proton

• electron cloud

Tags

NGSS.MS-PS1-1

What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?

• mass number

• atomic mass

• atomic number

• atomic symbol

Tags

NGSS.HS-PS1-8

Subatomic particle with a charge of 0

• neutron
• proton
• electron
• quark

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Tags

NGSS.MS-PS2-3

These will determine what element an atom is. 

• number of neutrons
• number of electrons
• number of atoms 
• number of protons 

Tags

NGSS.MS-PS1-1