Atomic Structure Unit Test

The symbol "K" represents which element?

• Magnesium
• Iron
• Potassium
• Copper

Tags

NGSS.HS-PS1-1

The atomic number indicates...

• the number of protons and neutrons an element has
• the number of protons an element has
• the average mass of all the isotopes of an element
• the number of electrons on the outer shell

The mass number of an element indicates...

• the number of protons and neutrons an element has
• the number of protons an element has
• the average mass of all the isotopes of an element
• the number of electrons on the outer shell

What is the atomic number of aluminum

• 13
• 26.98
• 27
• 3

Isotopes of the same element...

• have different number of neutrons
• have different number of protons
• have the same mass
• none of these are true

The center of an atom is known as the

• nucleus

• electron cloud

• neutron cloud

• mass circle

Tags

NGSS.HS-PS1-8

These particles have a mass of 1 amu

• protons and neutrons
• protons and electrons
• neutrons and electrons

Tags

NGSS.MS-PS1-1

Protons have this type of charge

• positive
• negative
• neutral - no charge

A particle that orbits around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The number 16 for the atomic element sulfur is the

• ionic number

• isotope

• atomic mass

• atomic number

Tags

NGSS.MS-PS1-1