Midterm study guide

Front

How many valence electrons does an atom have if it is represented by the symbol 'C'?

Back

Carbon has 4 valence electrons.

Front

What type of bonding occurs between two nonmetals?

Back

Covalent bonding occurs between two nonmetals.

Front

What is the SI unit for measuring mass?

Back

The SI unit for mass is kilogram (kg).

Front

What type of charges repel each other?

Back

Same charges repel each other.

Front

What do we call the one or two letters that represent the name of an element?

Back

These are called element symbols.

Front

What is the charge of an electron?

Back

The charge of an electron is negative.

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

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.