1. Main group elements, also called representative elements, consist of metals, non-metals, and metalloids. 2. These elements are classified into two main categories: alkali metals (groups IA) and alkaline earth metals (group IIA). 3. Alkali metals include lithium, sodium, potassium, rubidium, cesium, and francium and have an ns1 electronic configuration. Alkaline earth metals include beryllium, magnesium, calcium, strontium, barium, and radium and have an ns2 electronic configuration.

1. TOPIC:
1.MAIN GROUP ELEMENTS AND
IT,S THEORY,
2.{18 e- RULE} AND M-M BONDS
CALCULATION…

2. 1.Main group elements are also called “Represent
elements”
2.“S and P block elements are called Main group
elements…
3. It consist only metal, non –metal, metalloids….
4. Elements in groups IA to VIIIA are known as
main group elements….
5.Electronic configurations of these are all regular
and consistent…….(same number of Ve-)

6.  They are under classified two main categories
and they are..,
 *Alkali metal(IA)…..
 *Alkaline earth metals(IIA)….
 Alkali metals: H ,Li, Na, K , Rb, Cs, Fr….(ns1)
 Alkaline Earth metals: He, Be, Mg, Ca, Sr, Ba,
Ra…..(ns2)

21. 1,Protic solvent ---->solvent that contain must one
hydrogen bond(O-H),(F-H)..,
2,Aprotic solvent----->contains no hydrogen atom
3,Alkali= base (NaOH)(KOH)
4,ARENE= AROMATIC HYDROCARBON=ARYL
HYDROCARBON
Benzene, toluene..,
5,ALKYL= ALKANE+YL(methane+yl)=methyl
6,ARYL=ARENE+YL(benzene+yl)=benzyl……..,
THANK YOU……..(M.priyadharshan)