Periodic trends

Question 1

Alkali metal group /triad

Answer 1

Li , Na , K

Question 2

Halogen group

Answer 2

Cl , Br ,I

Question 3

Alkali Earth metal

Answer 3

Ca , Sr . Ba

Question 4

Triad is made made by

Answer 4

Johnn dobereiner

Question 5

law of octave is made by ?

Answer 5

John Newlands

Question 6

After which element newland law of octave dont work

Answer 6

Ca

Question 7

Horizontal element in periodic element

Answer 7

Periods

Question 8

Vertical element

Answer 8

Groups

Question 9

Mendeleev periodic law

Answer 9

The prop. of element are periodic function of their atomic masses ( taken from lother meyer’s curve)

Question 10

The scientist who said Atomic no.is better basis for classification of element

Answer 10

Henry moseley

Question 11

Modern periodic law

Answer 11

The prop. of element are periodic function of their atomic Number .

Question 12

NO . of periods in modern periodic table

Answer 12

7

Question 13

NO . of Groups in modern periodic table

Answer 13

18

Question 14

Who made Modern Periodic table

Answer 14

Neils Bohr

Question 15

Subshell name and max capcity electron

Answer 15

s sub shell - 2 el-, p - 6el, d- 10 el- , f- 14 el-

Question 16

D block is also called ?

Answer 16

Transition element

Question 17

Group 15 is called ?

Answer 17

Pnictogens ( toxic formation)

Question 18

Group 16 is called?

Answer 18

Chalcogens (ore formations)

Question 19

group 17 is called ?

Answer 19

halogens ( salt formation

Question 20

group 18 is called?

Answer 20

Noble gas /Aerogenes

Question 21

Most electronegative

Answer 21

Flourine