Atomic Structure

Which of the following subatomic particle determines the identity of an element?

• Neutron

• Proton

• Electron

An element with 7 neutrons and 6 protons has an atomic number of?

• 13

• 7

• 6
• 10

What is the atomic number of the atom pictured? 

• 11
• 12
• 22
• 23

Neutrons have almost exactly the same mass as

• electrons.

• positrons.

• protons.

• quarks.

Which particles are not inside the nucleus?

• Electrons

• Neutrons

• Protons

What is the lightest subatomic particle?

• atom

• electron

• proton

• neutron

How is Proton different from electron?

• An electron is much heavier than a proton.

• An electron carries more charge than a proton.

• A proton can be easily removed from the atom, but not an electron.

• A proton is positively charged, whereas an electron is negatively charged

Oxygen’s atomic number is 8. This means that an oxygen atom must have

• 8 electrons
• 8 protons
• 8 neutrons
• a mass number of 8

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons