Exploring Atomic Structure and Subatomic Particles

Which particle is located outside the nucleus of an atom?

• Protons

• Protons and Neutrons

• Neutrons

• Electrons

What is the charge of a proton?

• Negative

• Positive

• Neutral

• No charge

Why don't electrons fall into the nucleus?

• Due to the strong nuclear force

• Because they are repelled by neutrons

• Due to their speed and the electrostatic force

• Because of their negative charge

Tags

NGSS.MS-PS2-5

What force keeps protons together in the nucleus despite their repulsion?

• Electrostatic force

• Gravitational force

• Strong nuclear force

• Magnetic force

Which subatomic particle has the greatest mass?

• All have the same mass

• Proton

• Neutron

• Electron

What is the approximate mass of a proton in atomic mass units?

• 100

• 10

• 1

• 0.0005

How do you calculate the net charge of an ion with 12 protons and 9 electrons?

• 12 + (-9)

• 9 - 12

• 12 - 9

• 12 + 9

What is the net charge of an ion with 12 protons and 9 electrons?

• +3

• -3

• +1

• -1

Which statement is true about atoms?

• Atoms have no neutrons

• Atoms have more electrons than protons

• Atoms are electrically neutral

• Atoms have more protons than electrons

What is a positively charged ion called?

• Anion

• Cation

• Neutron

• Electron