Found In

Question 1

main commercial source of He

Answer 1

Natural gas

Question 2

He + Ne

radioactive origin

Answer 2

Pitch blende
Cleveite
Monazite

Question 3

Ar

Answer 3

Major component in atmp
[Noble gas EXCEPT Rn&Og =1% vol of atmp]

Question 4

Kr

Answer 4

KrF2 only possible

Question 5

Xe

Answer 5

Rare

Question 6

Rn

Answer 6

Rare
Rnf2
²²⁶Ra⁸⁸ -» ²²²Rn ⁸⁶ + ⁴He²

Question 7

Og
atomic number
atomic mass
half life

Answer 7

²⁴⁹Cf⁹⁸ + ⁴⁸Ca²⁰&raquo_space; ²⁹⁴Og¹¹⁸ + 3n
118
294
0,7ms

Question 8

Known as noble gas

Answer 8

They react w very few elements

Question 9

F

Answer 9

Present as insoluble fluorides

Question 10

Cl

Answer 10

2.5% sea water

Question 11

Ts

Answer 11

Synthetic
Radioactive

Question 12

Greatest source of halogen

Answer 12

Sea

Question 13

Most abundant element on Earth

Answer 13

O

Question 14

O
% in crust
% in air

Answer 14

46.6
21

Question 15

S
% in crust
In volcano
Sulphate
Sulphide

egg protein
garlic onion mustard hair wool

Answer 15

0.03-0.1
H2s

Baryte
Epsom salt
Gypsum
Plaster of paris

Copper pyrite
Galena
Zinc blende

Question 16

CaSo4.2h20

Answer 16

Gypsum

Question 17

Epsom salt

Answer 17

Mgso4.7h20

Question 18

Baryte

Answer 18

Baso4

Question 19

Galena

Answer 19

PbS

Question 20

Zinc blende

Answer 20

ZnS

Question 21

Copper pyrite

Answer 21

CuFeS2

Question 22

Selenium

Answer 22

Selenides in s ore

Question 23

Te

Answer 23

Tellurides in s ore

Question 24

Po

Lv
atomic no
mass
half life

Answer 24

Decay of Th and Ur
Radioactive
h6alf life 13.8 days

syn radioactive
small amount and half life fraction of a second

Question 25

Chalogens

Answer 25

Grp16

Question 26

CaS04.1/2H20

Answer 26

Plaster of paris

Question 27

N % atmp Earth's crust Other Plants amd animal

Answer 27

78% Nano3- Chile salt petre Kno3 - indian salt petre Proteins

Question 28

P Animals Phosphoproteins Occurs as minerals in

Answer 28

Bones+ living cell Milk and egg Apatite family Ca9[Po4]6.CaX2 Fluorapatite X = F /cl / OH

Question 29

As Sb Bi

Answer 29

Sulphide minerals

Question 30

Most abundant metal

Answer 30

Al

Question 31

abundant metal in Earth's crust 1st 2nd 3rd

Answer 31

O Si Al

Question 32

Mc Atomic number Mass number Electronic configuration Available in less amounts due to

Answer 32

115 289 [Rn] 5f14 6d10 7s2 7p3 Due to very short half life span