Atomic Structure

What is the relative charge of a proton?

• +1

• -1

• 0

• +2

The approximate relative mass of an electron is:

• 1

• 1/1840

• 0

• -1

Which subatomic particle has no charge?

• Proton

• Electron

• Neutron

The nucleus of an atom contains:

(Select all that apply)

• Protons

• Neutrons

• Electrons

Electrons in an atom are arranged in:

• A single layer

• The nucleus

• Shells or energy levels

The proton number of an element indicates

(Select all that apply)

• The number of neutrons

• The number of protons

• The number of electrons of the atom

• The sum of protons and neutrons

The nucleon number is also known as:

• Atomic number

• Mass number

• Electron number

• Charge number

Which of the following is true about the mass of subatomic particles?

• Proton ≈ Neutron > Electron

• Proton > Neutron > Electron

• Electron > Proton > Neutron

• Neutron > Proton > Electron

Which of the following best describes the structure of an atom? (Select all that apply)

• Protons and neutrons in the nucleus

• Electrons in shells around the nucleus

• Neutrons in shells around the nucleus

• Protons orbiting the nucleus

In a neutral atom, which of the following is always true?

• Number of neutrons = Number of electrons

• Number of protons = Number of electrons

• Number of protons = Number of neutrons

• Number of protons > Number of electrons