Question

ا- ڈھاجوانی کے زمانے کو یاد کر کے کیوں کیا؟ - میران طرز کے چراغوں کو کیا کیا خطرے درپیش رہتے ہیں؟​

Answer 1

Answer:

1 2  ...  12 13 14 15 16 17 18

H

He

Li

Be

B

C

N

O

F

Ne

Na

Mg

Al

Si

P

S

Cl

Ar

K

Ca

Zn

Ga

Ge

As

Se

Br

Kr

Rb

Sr

Cd

In

Sn

Sb

Te

I

Xe

Cs

Ba

Hg

Tl

Pb

Bi

Po

At

Rn

Fr

Ra

Cn

Nh

Fl

Mc

Lv

Ts

Og

Condensed periodic table showing a typical metal–nonmetal dividing line.

Elements commonly recognised as metalloids (boron, silicon, germanium, arsenic, antimony and tellurium) and those inconsistently recognised as such (polonium and astatine)

Metal-nonmetal dividing line (arbitrary): between Li and H, Be and B, Al and Si, Ge and As, Sb and Te, Po and At, Ts and Og