Elements

Front

What is an element?

Back

An element is the simplest natural substance that cannot be broken down into simpler substances by chemical means.

Front

What is the second letter of a chemical symbol always written as?

Back

The second letter of a chemical symbol is always written as a lowercase letter.

Front

How many valence electrons does Sodium (Na) have?

Back

Sodium has 1 valence electron.

Front

What is a dot diagram?

Back

A dot diagram, or Lewis dot structure, represents the valence electrons of an atom as dots around the chemical symbol.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the maximum number of valence electrons an atom can have?

Back

The maximum number of valence electrons an atom can have is 8, following the octet rule.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

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.

Front

What is the chemical symbol for Neon?

Back

The chemical symbol for Neon is Ne.