Structure of an Atom

What is the atomic number?

• number of protons
• number of neutrons

What number indicates the nucleus?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-8

Which statement best describes an electron?

• Smaller mass than a proton and a negative charge
• Smaller mass than a proton and a positive charge
• Greater mass than a proton and a negative charge
• Greater mass than a proton and a positive charge

Tags

NGSS.MS-PS2-3

How many electrons are in the element, Oxygen, with the atomic number of 8?

• 7
• 10
• 8
• 9

Tags

NGSS.MS-PS1-1

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Atomic number equals ______________ and _______________

• Neutrons

• Protons

• Electrons

• Elements

How many neutrons does this element have?

• 1

• 2

• 3

• 4

Which element has 31 protons ?

• Gallium 
• Germanium
• Gadolinium
• Polonium

Tags

NGSS.MS-PS1-1

Which particles make up the nucleus of an atom?

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

Tags

NGSS.MS-PS1-1

The subatomic particle that determines the identity of an element.

• neutron
• proton
• electron
• outer shell