Chapter 7

What is the basic structure of an atom?

• Nucleus and shells

• Protons and neutrons only

• Electrons only

• Subatomic particles only

Which of the following describes an orbital?

• A fixed path of electrons

• A type of subatomic particle

• A region of maximum probability of finding an electron

• A particle in the nucleus

How many types of subshells are there?

• 5

• 4

• 3

• 2

What does the principal quantum number (n) describe?

• Spin of the electrons

• Orientation of the orbital

• Shape of the orbital

• Energy of the electron and distance from nucleus

Which quantum number describes the shape of the orbital?

• Principal quantum number

• Angular momentum quantum number

• Magnetic quantum number

• Spin quantum number

What is the maximum number of electrons in a p subshell?

• 2

• 6

• 10

• 14

Which of the following is true about diamagnetic substances?

• They are attracted to magnets

• They have all electrons paired

• They have unpaired electrons

• They have a net magnetic moment

What is the noble gas notation for silicon?

• [Kr]4s2 3d10

• [Ar]3s2 3p2

• [Ne]3s2 3p4

• [Ne]3s2 3p2

According to the Aufbau principle, which orbital fills first?

• 3d

• 4s

• 2p

• 1s

What does Hund's rule state?

• Electrons are distributed randomly

• Maximum unpaired electrons exist in a subshell

• Electrons must have opposite spins in an orbital

• Electrons fill the lowest energy orbitals first