Unit 3 Study Guide

Front

What happens to the electronegativity of elements in group 16 as you move from top to bottom?

Back

The electronegativity decreases.

Front

Which element is classified as a halogen?

Back

Iodine.

Front

Is magnesium (Mg) an alkali metal or an alkaline earth metal?

Back

Magnesium is an alkaline earth metal.

Front

How many electrons does a neutral copper atom (atomic number 29) have when it becomes a 2+ ion?

Back

27 electrons.

Front

Which atom has the largest atomic radius among potassium, rubidium, francium, and cesium?

Back

Francium has the largest atomic radius.

Front

Define electronegativity.

Back

Electronegativity is the tendency of an atom to attract electrons in a chemical bond.

Front

What are the main characteristics of halogens?

Back

Halogens are highly reactive nonmetals, found in group 17 of the periodic table.

Front

What distinguishes alkali metals from alkaline earth metals?

Back

Alkali metals are in group 1 and have one valence electron; alkaline earth metals are in group 2 and have two valence electrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

Explain the trend in atomic radius as you move down a group in the periodic table.

Back

The atomic radius increases as you move down a group due to the addition of electron shells.