TABLE OF CONTENTS:

1...............physical and chemical properties

3..................physical and chemical changes

4...................which family is chromium in?

6......................what sate is chromium in?

8.........................atomic number and mass

10...........................who found chromium?

12.........................compounds of chromium

13...................... common uses of chromium

14.....what does chromium do to the environment?

15..................................random facts

PHYSICAL AND CHEMICAL PROPERTIES

Chromium is hard solid that is shiny and can be found in many different pigments. Chromium is a metal that reacts with many things except it does

not react with water.

PHYSICAL AND CHEMICAL CHANGES

PHYSICAL CHANGES:

-chromium can be turned into a liquid.

-chromium can be turned into a gas.

-chromium can be broken into pieces.

CHEMICAL CHANGES:

-when it reacts with different things, chromium can change colour.

-when chromium is mixed with oxygen it makes rust.

WHICH FAMILY IS CHROMIUM IN?

Chromium is in the fourth row from the right. This means it is in the "transition metals"

family group.

WHAT STATE IS CHROMIUM IN?

Chromium is a solid. In nature chromium is

found as a metal. It can also be turned into a

liquid or gas.

ATOMIC NUMER AND MASS

Chromium has the atomic number 24. The

number 24 tells us how many protons (positive

charge) and electrons (negative charge) are in one atom of chromium. The atomic mass tells us

the weight of an atom. Atomic mass also helps

find out how many neutrons (no charge) are in

chromium. Chromium has 24 protons, 24

electrons, and usually 28 neutrons.

WHO FOUND CHROMIUM?

A man named Louis Nicolas Vauqelin found

chromium a long time ago in 1798, all by accident. He was working with something called

'siberian red lead', he wanted to take only one

piece of it and put it by itself. Soon enough, it

mixed with the oxygen and he named it

'chromium'. The name "chromium" comes

from the greek word 'chroma', which means

colour, because chromium comes in many

different colours like purple, orange, black,

green and yellow.