The H

alogens

Group 17 on the P

eriodic Table

By C

hristine Ngo, K

ristal E

spana, Rebecca O

dusola, Jerem

y Bekkouche

● Click to edit Master text stylesSecond level

Third levelFourth levelFifth level

The

Halo

gens

● Group of nonmetals● All elements in this group are reactive● Fluorine, Chlorine, Bromine, Iodine and

Astatine are all in the halogens group.

Fl

uorine

●

Gas at room

tem

perature and extrem

ely reactive●

Isolated by Henri

Moissan in 1886

●

Can be found in

toothpaste and in w

ater systems

where they help to

prevent tooth decay

Chlorine

●

Greenish-yellow

gas w

ith a noticeable odor

●

In high concentration it w

ill be toxic

●

Was used in W

orld W

ar I as a poison gas

●

Prepared by

Scheele in later

1700, proved tobe an elem

ent by D

avy in 1810

●

Used in sw

imm

ing pools to get rid of any bacteria

Bromine

●

Reddish-brow

n fuming

liquid with a chlorine-like

smell.

●

Isolated in pure form by

Balard in 1826.

●

Only non-m

etal that is liquid at norm

al room

conditions.

●

Can cause painful burns

that heal slowly w

hen applied on the skin.

●

Used for

dyes,disinfectants,and photographic chem

icals.

Iodine

●

It was discovered in

1811 by Curtis

●D

ark gray solid with

a faint metallic luster

●

When heated, it turns

to a violet gas

●

Important elem

ent in the hum

an diet

●

Crucial for a properly

working thyroid gland

●

Used in table salt

●

Used m

edically for the thyroid and anything that has to deal w

ith that gland.

Astatine

●

Last of the known

halogens in 1940 by C

orson and others at the university in C

alifornia.

●

It is radioactive and its nam

e, from the

Greek astatos,

means “uristable”

●

Astatine is expected

to react like others halogens but less active

●

Should be a tiny

quantities of astatine in the earth's crust.