additional points part 2

What does the atomic number of an element represent?

• Number of neutrons

• Number of protons

• Number of electrons only

• Sum of protons and neutrons

The mass number of an atom is equal to:

• Protons + Neutrons

• Electrons + Protons

• Neutrons only

• Electrons + Neutrons

An atom has 17 protons and 18 neutrons. Its atomic mass is:

• 17

• 18

• 35

• 34

The number of electrons in a neutral atom is always equal to:

• Atomic number

• Mass number

• Neutrons

• Protons + Neutrons

Isotopes of the same element differ in:

• Number of protons

• Number of electrons

• Number of neutrons

• Chemical properties

Who proposed the quantum mechanical model of the atom?

• Bohr

• Dalton

• Schrodinger

• Thomson

The quantum model is based on:

• Energy levels

• Electron orbits

• Probability of electron location

• Fixed planetary motion

The Heisenberg Uncertainty Principle states:

• Electrons follow fixed paths

• Electron position and momentum cannot both be known exactly

• Energy levels are infinite

• Electrons have no mass

What is the shape of the s-orbital according to the quantum model?

• Dumbbell

• Spherical

• Double Dumbbell

• Complex

Which orbital type has the highest energy among these?

• s

• p

• d

• f