Electrons

Bohr's model of the atom proposed that ___.

• electrons move around the nucleus in fixed orbits
• neutrons move around the nucleus
• neutrons do not exist, but are just paired protons and electrons
• the nucleus spins

The impossibility to know simultaneously the exact position and velocity of a particle is called the:

• Einstein Uncertainty Principle

• Moseley Uncertainty Principle

• Heisenburg Uncertainty Principle

• Bohr Uncertainty Principle

How many electrons does an atom with 8 protons have (assuming the atom is neutral)?

• 8

• 16

• 15.99

• 24

The first orbital, energy level 1, can hold a maximum of how many electrons?

• 2
• 3
• 8
• 6

Which of the following correctly describes the electron cloud model?

• Electrons do not follow fixed orbits, but are found more frequently in areas around the nucleus.
• Electrons are found in fixed orbitals around a positive nucleus.
• All of an atom's mass is concentrated in the electron cloud around the nucleus.
• Electrons are evenly embedded throughout a positively charged sphere.

An atom that has gained energy beyond normal is said to be ...

• excited

• energized

• naturalized

• grounded

The energy of an electron __________ as it moves further away from the nucleus

• increases
• decreases

The rule that states: All orbitals of equal energy are occupied by one electron in one spin direction before any single orbital is occupied by a second electron.

• Aufbau principle

• Pauli exclusion principle

• Hund’s rule

• Core Notation

What shape would the p orbital take?

• sphere

• infinity symbol

• clover leaf

• none of the above

How many orientations (m quantum number) can the d-orbital have?

• 1

• 3

• 5

• 7