Periodic Table

Question 1

Who is credited with the creation of the Periodic Table?

Answer 1

Dimitri Mendeleev, a Russian scientist who is credited with the creation of the Periodic Table.

Question 2

Explain group 1. And explain the properties.

Answer 2

Alkali metals all have one electron in their orbit, and are very reactive.
Physical property: soft and easily cut
General property: stored in oil.

Question 3

Explain group 2.

Answer 3

The Alkaline Earth Metals all have 2 electrons in their outer orbit. Not as reactive as Alkali Metals but still quite reactive.

Question 4

Explain group 7.

Answer 4

Halogens have 7 electrons in their outer orbit so highly reactive.

Question 5

Explain group 8.

Answer 5

Nobel Gases have 8 electrons in their outer orbit. Very unreactive - therefore stable

Question 6

What is the octet rule?

Answer 6

This the governing rule of reactivity. All atoms want to be stable. They need a full outer orbit to be stable. A full outer orbit is usually 8 electrons. Hydrogen and helium are the exceptions as these both want 2 electrons in their outer orbits.