Atomic structure

What is the atomic number of an element?

• The number of neutrons in the nucleus.

• The number of protons in the nucleus.

• The total number of electrons in an atom.

• The average mass of an atom.

What is the charge of an electron?

• Positive

• Neutral

• Negative

• Variable

What is the atomic mass of Boron?

• 10

• 11

• 12

• 13

The 2nd energy level contains how many electrons?

• 2 electrons

• 8 electrons

• 10 electrons

• 4 electrons

What is the mass number of an atom?

• The total number of protons and neutrons.

• The total number of electrons and protons.

• The average weight of an atom in atomic mass units.

• The number of protons only.

What is the electron configuration of Carbon?

• 1s² 2s² 2p²

• 1s² 2s² 2p⁶

• 1s² 2s² 2p¹

• 1s² 2s² 3p²

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

What is the charge of a proton?

• Negative

• Neutral

• Positive

• Variable

How many electrons does a Copper atom have?

• 27

• 28

• 29

• 30

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass.

• False - Protons are much heavier than Neutrons.

• False - Neutrons are much heavier than Protons.

• True - Protons and Neutrons have significantly different masses.