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THE PERODIC TABLE
IT IS ARRANGE ACCORDING TO THE NO. OF PROTONS
Electronic configuration can be worked out by the atomic number
IMPORTANT DEFINITION
Metalloid is a element that both metal and non-metal
Alkali metals are group 1
Halogen is in group 7
Catalyst is a substance that speeds the chemical reaction
Alkali metal physical
1) density of the alkali metal generally increases down to the groups
2) soft
3) low Melting and boiling point
4) good heat and electricity
Alkali metal ( physical properties )
1) low melting and boiling point
2) density increase as it goes down the Periodic table
3) good conduct of heat and electricity
4) soft
HALOGEN
low melting point and boiling point
Non-conducted of electricity
Colour , melting and boiling point INCREASES
NOBLE GASE
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