Chemistry

Front

An electron is

Back

negatively charged

Front

atomic number is

Back

the number of protons

Front

Atomic Mass is the number of

Back

protons and neutrons in the nucleus of an atom

Front

Conservation of mass means

Back

atoms present before chemical reactions are present after

Front

An element is

Back

a substance that cannot be split into simpler substances

Front

A pure substance that is a compound is made out of

Back

particles of more than one type of atom

Front

What is a molecule?

Back

2 or more atoms that are combined

Front

Signs of a chemical change include:

Back

change of colour, change of temperature, precipitate (solid) formed, gas released.

Front

Characteristics of metals on the periodic table

Back

have free electrons

Front

Water is the product of the reactants:

Back

hydrogen and oxygen