Chem Groups in the Periodic Table

What do Alkaline Metals Contain?

OH- ions

What do acids contain?

H+ ions

What do Alkaline Metals Contain?

OH- ions

What do acids contain?

H+ ions

What group is group 1?

Alkali metals

Alkali metals are…

Easily oxidised and burn in air

Alkali metals + oxygen =

An oxide

The reactivity of alkali metals…

Increases down the group

Alkali metal + water =

Hydroxide metal + hydrogen

The more shells in an alkali metal…

The more reactive it is

When lithium reacts with water…

It will fizz violently and release hydrogen gas until it dissolves

When sodium reacts with water…

It fizzes violently and releases hydrogen gas until it dissolves

When potassium reacts with water

It combusts, and releases hydrogen

Argon is…

Inert

Halogens are … molecules

Diatomic

Halogen molecules are held together by

Covalent bonds

Halogens are…

Non metals

Are halogens good conductors of electricity?

No

Are halogens safe to handle?

No, they are toxic and corrosive

Halogens react with hydrogen to form…

Hydrogen halides

Hydrogen halides dissolve in water to form…

Acids

Test for chlorine

Damp blue litmus paper turns red, then bleaches white

Fluoride is used to…

Cure tooth decay

Chloride is used…

In the health industry for better absorption of medicine

Iodide is used for…

Treating overactive thyroids

The reactivity of halogens…

Decreases down the group

What are group 7 elements

Halogens

What are group 0 elements

Noble gases

Density… as you go down group 0

Increases

Do noble gases react with other elements?

No, they are inert

Noble gases have a … outer shell

Full

Melting and boiling points of noble gases…

Decrease as you go down the group

Why were noble gases hard to detect in the 19th century?

They did not react with anything

Noble gases are inert because…

They have a full outer shell