3.1A The Periodic Table

The periodic table consists of…

horizontal periods and vertical groups

Groups are labelled from…

1-18

The period number corresponds to the…

principal quantum number of the outermost electron sub levels

What is the principal quantum number?

the coeffienct before the orbital (e.g. 3s)

The people table is also divided into four blocks

Where are non-metals found?

the upper right of the p-block

What are Halogens and where are they found?

reactive group of non-metals found in group 17

What are Noble Gases and where are they found?

very unreactive group of non-metals found in group 18

Where are metallic elements found? Tell me about their two components.

left side of p-block, the d-block, the f-block, and s-block (excluding H and He)

Alkali metals: reactive metals found in group 1

Lanthanoids and Actinides are the first and second row of the f-block

Metalloids have the physical properties and qappearance of metals (mostly), but behave in a way that is similar to non-metals chemically.

e.g. Boron, SIlicon, Germanium, Arsenic, Antimony, Tellurium, Polonium

They are found on the staircase between metals and non-metals