Atomic Models and Subatomic Particles

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

The atomic mass is equal to _.

• the number of protons only
• the number of neutrons only
• the total number of protons and neutrons
• the number of protons, neutrons, and electrons.

Tags

NGSS.HS-PS1-7

What subatomic particles make up the nucleus of an atom?

• electrons

• protons

• neutrons

• leptons

• mesons

Tags

NGSS.HS-PS1-8

What is atomic number?

• Number of protons in an atoms 
• Number of neutrons in an atom
• Mass of an atom
• Charge on an atom

What electrical charge does a proton have?

• +1
• 0
• -1
• +2

What mass does a neutron have?

• 1 amu

• 0 amu

• -1 amu

• +2 amu

Tags

NGSS.HS-PS1-8

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

What is the mass number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons and electrons in the atom

Tags

NGSS.HS-PS1-8

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1