Atomic Structure Quiz

What is the charge of the nucleus in an atom?

• Depends on the element

• Neutral

• Negatively charged

• Positively charged

Answer explanation

The charge of the nucleus in an atom is positively charged.

What is the typical size (order of magnitude) of atoms?

• 10^-10 metres

• 10^-5 metres

• 10^-15 metres

• 10^-20 metres

Answer explanation

The typical size of atoms is around 10^-10 metres, making the correct answer choice 10^-10 metres.

How do isotopes of an element differ?

• Different number of protons

• Different number of electrons

• Different number of neutrons

• Different number of positrons

Answer explanation

Isotopes of an element differ in the number of neutrons they have. While they have the same number of protons and electrons, the varying number of neutrons distinguishes isotopes from each other.

What is the relative charge of an electron?

• +1

• -1

• 0

• +2

Answer explanation

The relative charge of an electron is -1, indicating a negative charge.

In an atom, the number of protons is equal to the number of which particles?

• Positrons

• Nucleons

• Electrons

• Neutrons

Answer explanation

In an atom, the number of protons is equal to the number of electrons, making electrons the correct choice.

What is the relative charge of a proton?

• +1

• -1

• 0

• +2

Answer explanation

The relative charge of a proton is +1, indicating a positive charge.

Which particle in an atom has no charge?

• Proton

• Electron

• Neutron

• Positron

Answer explanation

The particle in an atom that has no charge is the Neutron.

What determines the chemical element of an atom?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of positrons

Answer explanation

The chemical element of an atom is determined by the number of protons it contains.

Which subatomic particle is found in the nucleus and has a positive charge?

• Electron

• Neutron

• Proton

• Positron

Answer explanation

The subatomic particle found in the nucleus with a positive charge is the Proton.

What is the relative mass of an electron compared to a proton?

• Approximately the same

• About 1/2000th

• Twice as much

• Half as much

Answer explanation

The correct choice is 'About 1/2000th' because the relative mass of an electron compared to a proton is approximately 1/2000th.