1st semester final review #4: Atomic Theory/Waves/Isotopes

Front

What happens when an electron emits a photon of light?

Back

The electron decreases its energy level.

Front

What is the average atomic mass of argon given the isotopes 36Ar (0.337%), 38Ar (0.063%), and 40Ar (99.600%)?

Back

39.99

Front

What happens when an electron absorbs a photon of light?

Back

The electron increases its energy level.

Front

What is the IUPAC name for Mg(OH)2?

Back

Magnesium hydroxide.

Front

Which element family forms +2 ions when they react?

Back

Alkaline Earth Metals.

Front

Define atomic theory.

Back

Atomic theory is the scientific theory that matter is composed of discrete units called atoms.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the principle of wave-particle duality?

Back

Wave-particle duality is the concept that every particle or quantum entity may be described as either a particle or a wave.

Front

What is the significance of the quantum number n?

Back

The quantum number n indicates the energy level of an electron in an atom.

Front

What is the difference between a cation and an anion?

Back

A cation is a positively charged ion, while an anion is a negatively charged ion.