Hey friends!!
How r u?
Give me first 20 elements atomic mass and atomic number........
Answers
Answer:
HERE'S YOUR ANSWER DEAR ⚡
Explanation:
(first is atomic mass and 2nd is atomic no.)
Hydrogen
1 H 1
Helium
4 He 2
Lithium
7 Li 3
Beryllium
9 Be 4
Boron
11 B 5
Carbon
12 C 6
Nitrogen
14 N 7
Oxygen
16 O 8
Fluorine
19 F 9
Neon
20 Ne 10
Sodium
23 Na 11
Magnesium
24 Mg 12
Aluminium
27 Al 13
Silicon
28 Si 14
Phosphorus
31 P 15
Sulphur
32 S 16
Chlorine
35.5 Cl
Argon
40 Ar 18
Potassium
39 K 19
Calcium
40 Ca 20
HOPE IT HELPED YOU
Answer:
atomic number ) element name :- mass number
1) Hydrogen :- 1
2) Helium :- 4
3) Lithium :- 7
4) Beryllium :- 9
5) Boron :- 11
6) Carbon :- 12
7) Nitrogen :- 14
8) Oxygen :- 16
9) Fluorine :- 18
10) Neon :- 20
11) Sodium :- 23
12) Magnesium :- 24
13) Aluminum :- 27
14) Silicon :- 28
15) Phosphorus :- 31
16) Sulphur :- 32
17) Chlorine :- 35.5
18) Argon :-40
19) Potassium :- 39
20) Calcium :- 40