Periodic Table Practice Test

Front

What describes the relationship between the two forms of solid phosphorus based on their crystal shapes and melting points?

Back

Different crystal structures and different properties.

Front

How does the radius of a potassium ion compare to that of a potassium atom?

Back

A potassium ion has a smaller radius than a potassium atom.

Front

What classification do the elements in Group 2 belong to?

Back

Metals.

Front

What term describes the attraction one atom has for the electrons in a bond with another atom?

Back

Electronegativity.

Front

Which element is least likely to undergo a chemical reaction?

Back

Neon.

Front

What is the general trend in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group.

Front

What is the trend in electronegativity as you move across a period from left to right?

Back

Electronegativity increases as you move from left to right across a period.

Front

What is the primary characteristic of noble gases?

Back

Noble gases are inert and do not readily react with other elements.

Front

What is the significance of the atomic number of an element?

Back

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

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.