Unit 2 Pretest: Atoms and The Periodic Table

Front

What is the Plum Pudding Model of the atom?

Back

A model developed by J.J. Thompson that depicts electrons floating freely in a positive space.

Front

Where are metals located on the periodic table?

Back

Metals are found on the left side of the periodic table.

Front

Why is plastic used to cover copper wires in power cords?

Back

Plastic differs from copper in electrical conductivity.

Front

What is the center of an atom called?

Back

The nucleus.

Front

What does it mean that scientists continue to update the atomic model?

Back

It means new information about atoms continues to be discovered.

Front

What are atoms?

Back

The basic building blocks of matter, consisting of protons, neutrons, and electrons.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically good conductors of heat and electricity, while nonmetals are not.

Front

What is a chemical element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.