Pre-Test Chemistry

Front

What are the vertical columns in the Periodic Table called?

Back

Groups

Front

Is the equation Al + O₂ --> 2Al₂O₃ balanced?

Back

No!

Front

Which states of matter have a definite volume?

Back

Solid and liquid

Front

What is the electron configuration of an oxygen atom?

Back

1s²2s²2p⁴

Front

What is the mass of an object if it is measured as 272.1 g?

Back

272.1 g

Front

What is the definition of a chemical element?

Back

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

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.