Semester Review #2: Unit 4 & 5: Modern Atomic Theory & Bonding

Front

What is the smallest atomic radius among the following elements: magnesium, chlorine, bromine, argon?

Back

Argon has the smallest atomic radius.

Front

What is a valence electron?

Back

A valence electron is an electron that is found in the outermost shell of an atom.

Front

An element will always have the same number of which subatomic particle?

Back

Protons.

Front

As you move across the periodic table, why do atoms tend to get smaller?

Back

Because the atoms have a bigger effective nuclear charge.

Front

How many electrons can the d sublevel hold?

Back

The d sublevel can hold 10 electrons.

Front

Define atomic radius.

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the effective nuclear charge?

Back

The effective nuclear charge is the net positive charge experienced by an electron in a multi-electron atom.

Front

Explain the trend of atomic radius in the periodic table.

Back

Atomic radius decreases across a period from left to right and increases down a group.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is the maximum number of electrons in the p sublevel?

Back

The p sublevel can hold a maximum of 6 electrons.