Question

First 40 elements their atomic number and mass number

Answer 1

Search google for a latest 2019 periodic table and print it out... it may have both the atomic numbers and mass numbers... print it out

Answer 2

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First 40 elements with their atomic number and mass number.


$\bf{Element} \: \: \: \: \: \bf{Atomic \: no.} \: \: \: \: \bf{Mass \: no.}$


Hydrogen ------ 1 --------- 1

Helium ---------- 2 -------- 4

Lithium ---------- 3 -------- 7

Beryllium ------- 4 -------- 9

Boron ----------- 5 ------ 10.8

Carbon ---------- 6 -------- 12

Nitrogen ------- 7 -------- 14

Oxygen. -------- 8 -------- 16

Fluorine -------- 9 -------- 19

Neon ----------- 10 ------- 20

Sodium -------- 11 -------- 23

Magnesium --- 12 ------- 24

Aluminium ---- 13 -------- 27

Silicon ----------14 ------- 28

Phosphorus -- 15 -------- 31

Sulphur ------- 16 -------- 32

Chlorine ------- 17 ------ 35.5

Argon ---------- 18 -------- 40

Potassium ---- 19 -------- 39

Calcium ------- 20 ------- 40

Scandium ---- 21 -------- 45

Titanium ----- 22 ------- 47.8

Vanadium ---- 23 -------- 51

Chromium ----24 -------- 52

Manganese - 25 -------- 55

Iron ----------- 26 -------- 56

Cobalt -------- 27 -------- 59

Nickel -------- 28 ------ 58.8

Copper ------ 29 ------ 63.5

Zinc ----------- 30 -------- 66

Gallium ------- 31 --------- 70

Germanium --32 -------- 73

Arsenic --------33 -------- 75

Selenium ----- 34 -------- 79

Bromine ------ 35 -------- 80

Krypton ------- 36 -------- 84

Rubidium ----- 37 -------- 85

Strontium ----- 38 -------- 88

Yttrium --------- 39 -------- 89

Zirconium ----- 40 -------- 91



EXTRA INFORMATION ÷

i >> This is the modern form of Periodic Table

ii >> It is based on the Atomic number of the elements.

iii >> Father of Modern Periodic Table is Dmitri Mendeleev.

iv >> The modern Periodic Table consists of 18 vertical columns and 7 horizontal rows.

v >> Elements in a group have similar chemical and physical properties because they have the same number of outer electrons.