Science Vocab Test 1

Front

Definition of chemical change?

Back

Formation of new chemical substances.

Front

H₂O: Element or Compound?

Back

Compound

Front

A series of numbers and letters representing a molecule

Back

chemical formula

Front

HCN consists of 3 types of atoms.

Back

True

Front

A pure substance made of one type of atom, not separable by physical or chemical means.

Back

element

Front

Two different atoms chemically bonded form a new substance.

Back

Compound

Front

Physical change

Back

Alters physical properties without changing identity.

Front

What is a precipitate?

Back

A solid that forms when two solutions are combined.

Front

Pure substance?

Back

Water

Front

Subscript

Back

Number written to the right and slightly below an element in a chemical formula; indicates the number of atoms of that element.