Atomic Concepts

What percentage of this mixture of isotopes is nitrogen with mass 15?

• about 20%

• About 15%

• About 90%

• About 9%

Tags

NGSS.MS-PS1-1

What is the smallest building blocks of matter?

• molecule

• proton

• atom

Which of the following particles is found in the shells of an atom?

• protons

• electrons

• neutrons

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 4

• 5

• 9

• none of the above

Tags

NGSS.MS-PS1-1

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

• 14

• 7

• 15

Tags

NGSS.MS-PS1-1

What charge does an electron have?

• Negative

• Positive

• Neutral

Tags

NGSS.MS-PS1-1

NGSS.MS-PS2-3

What subatomic particle is electrically neutral (no charge)?

• Proton

• Ion

• Neutron

• Electron

Tags

NGSS.MS-PS1-1

Which of these has the smallest mass?

• A proton

• An electron

• A neutron

Which particles have mass in an atom?

• neutrons

• electrons

• protons

• nucleus

How many Aluminum atoms are in Al₂O₃?

• 3

• 5

• 2

Tags

NGSS.MS-PS1-1