A totally redundant and no life post, so ignore it ya :)
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To sum it all up,

-Period: Horizontal rows that are arranged according to increasing (by 1) proton/atomic numbers. (Period no. same as no. of electron shells in that period)
-Groups: Vertical rows that have similar chemical and physical properties. (Same no. of valence electrons in the same group.)

As it goes from left to right, there is an increase in non-metallic properties and decrease in metallic properties.

Group I, II : Basic oxides
Group III: Amphoteric oxides
Group IV, V, VI, VIII: Acidic oxides
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Group I- Alkali Metals (soft, i.e. can be cut easily, shiny & silvery)
1. Low melting & boiling points. (Decreases down the group)
2. Low densities. (Increases down the group)
3. 1 valence electron.
4. Li, Na, K float on water.
5. Reacts with cold water to form hydrogen and alkali.
6. Powerful reducing agents because they lose electrons readily (i.e. they oxidises).
7. Reactive metals. Reactivity increases down the group because as the atomic radius increases, it is easier to lose valence electron from bigger atoms.
8. Compounds formed are ionic, soluble in water and have similar chemical formula.

Group VII- Halogens (non-metals, diatomic molecules)
1. Low melting and boiling points. (Increases down the group)
2. Colours becomes darker as it goes down the group.
3. Reactive non-metals, because they have 7 valence electrons, which means that only 1 more electron is required to achieve noble gas structure.
4. Halogens + Metals = Halides.
5. Reactivity decreases down the group because .... Idk.
6. Displacement reaction... ??????
7. Powerful oxidising agents because halogen atoms readily gain electrons to form halide ions.
8. (Can be classified at redox reactions?????)

Group 0- Noble Gases (monatomic elements, inert)
1. Low melting and boiling points. (Increases down the group)
2. Colourless gases at r.t.p.
3. Insoluble in water.
4. Unreactive because they have full electronic structures.
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I think that's all for this chapter? :D For easy taking of notes cause I'm lazy to write down. Tell me if I made any mistakes if possible, tyvm. Anw, this is a good excuse to use the comp and revise at the same time, LOL I'll take a rest first. Mole concept.....

Mass = Mr x No. of mol
Volume = No. of mol x 24dm3
No. of molecules = No. of mol x 6 x 10^23
% of element = (No. of atoms x Ar of element) / Mr of compound x 100%
Empirical formula........... Hmmm I'll touch on it later.

OMG VITASOY IS SO NICE! :D

PS: You can take these as reference but no guarantee that it's 100% right :)

Bye I go get another Vitasoy!!! :D (Sorry my retardation is the effect of overloaded information on my head)