Year 9 atomic structure

What is the atomic number?

• The number of protons in an element
• The number of neutrons in an element
• The number of protons and neutrons.
• The number of protons and electrons.

Tags

NGSS.MS-PS1-1

What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?

• 12
• 13
• 25
• 24

Tags

NGSS.MS-PS1-1

Changing the number of electrons in an atom changes its...

• element type.
• charge.
• isotope type.
• atom type.

Tags

NGSS.MS-PS1-1

Changing the number of neutrons in an atom changes its...

• element type.
• mass (weight).
• charge.
• atom type.

Tags

NGSS.MS-PS1-1

How many protons are in an atom of carbon?

• 12.01
• 8
• 6
• 14

Tags

NGSS.MS-PS1-1

How many electrons does a neutral carbon atom have?

• 0
• 2
• 14
• 6

Tags

NGSS.MS-PS1-1

When there are the same number of protons and electrons in an atom, that atom is a...

• positive ion.
• negative ion.
• unstable isotope.
• neutral atom.

Tags

NGSS.MS-PS1-1

Which is an electron?

• A
• B
• C

Tags

NGSS.MS-PS1-1

Which is a proton?

• A
• B
• C

Tags

NGSS.MS-PS1-1

Which is a neutron?

• A
• B
• C

Tags

NGSS.MS-PS1-1