Chemistry Unit Test 1

A substance is a single kind of matter that has a specific composition

Which part of the atom moves around the nucleus?

The atomic number of an element is based on the

The smallest part of an element is a(n)

Atoms with the same number of protons and a different number of neutrons are called Alloys

The smallest part of an element is an atom

From an elements location in the periodic table, you can predict.

Two or more substances mixed together but not chemically combined is an example of a(n)

A column of elements in the period table is called a

A group of 2 or more elements held together by chemical bonds is called a

The chemical symbol for Helium is He

The center of the atom is called the

Mendeleev created the first periodic table by arranging elements in order of

The rows across in the periodic table are known as groups

The modern periodic table is organised according to Atomic Mass

Hardness, freezing, melting etc. are all examples of

Each element is given a ________________ that consists of one or two letters.

A mixture that is evenly mixed and difficult to separate is