How to find out a element when group and period are given to us in the question
Answers
If the atomic number is given from the electronic configuration we can find the poasition of the element.
Example:
Carbon (6)
Electronic configuration: (2,4)
No. of valence electrons gives the group number and no of shells gives period.
So it corrosponds to group 4 and period 2.
To find an element you must know its atomic number. Then to find its place in modern periodic table see the no.of valence electron in last shell. If the electron in outermost shell is more that 2 then add +10 to it by this you will find the group number and for period, see the no.of shells .
This will help you in finding name of particular element:
Atomic number Name of element
1 Hydrogen
2 Helium
3 Lithium
4 Beryllium
5 Boron
6 Carbon
7 Nitrogen
8 Oxygen
9 Fluorine
10 Neon
11 Sodium
12 Magnesium
13 Aluminium
14 Silicon
15 Phosphorus
16 Sulphur
17 Chlorine
18 Argon
19 Potassium
20 Calcium
These above mentioned material are enough for your understanding.