Unit 2 Review

Which subatomic particle has a positive charge?

• proton

• neutron

• electron

• midichlorian

Which subatomic particle as no charge, also known as a neutral charge?

• proton

• neutron

• electron

• chakra

What is the center of an atom called?

• Electron orbitals

• Isotopes

• The hypothesis

• The nucleus

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

The atomic number of Lithium is

• 3
• 4
• 5
• 6

What is the mass number of a nitrogen atom that has 8 neutrons?

• 15

• 14

• 22

• 8

What is the mass number of an atom that contains 9 protons, 10 neutrons, and 9 electrons?

• 9

• 10

• 18

• 19

These three isotopes of carbon have different -

• Atomic numbers

• Mass numbers

• Numbers of protons

• Symbols

All the isotopes of a particular element will always have the same -

• Atomic number

• Mass number

• Number of neutrons

• Total number of subatomic particles