name of 20 elements with their atomic number
Answers
Explanation:
Atomic number. Elements
1. hydrogen
2. helium
3. lithium
4. beryllium
5. boron
6. carbon
7. nitrogen
8. oxygen
9. fluorine
10. neon
11. sodium
12. magnesium
13. aluminium
14. Silicon
15. phosphorus
16. sulfur
17. chlorine
18. argon
19. potassium
20. calcium
Answer:
1 1.008 Hydrogen H -259 -253 0.09 0.14 1776 1 1s1 13.60
2 4.003 Helium He -272 -269 0.18 1895 18 1s2 24.59
3 6.941 Lithium Li 180 1,347 0.53 1817 1 [He] 2s1 5.39
4 9.012 Beryllium Be 1,278 2,970 1.85 1797 2 [He] 2s2 9.32
5 10.811 Boron B 2,300 2,550 2.34 1808 13 [He] 2s2 2p1 8.30
6 12.011 Carbon C 3,500 4,827 2.26 0.09 ancient 14 [He] 2s2 2p2 11.26
7 14.007 Nitrogen N -210 -196 1.25 1772 15 [He] 2s2 2p3 14.53
8 15.999 Oxygen O -218 -183 1.43 46.71 1774 16 [He] 2s2 2p4 13.62
9 18.998 Fluorine F -220 -188 1.70 0.03 1886 17 [He] 2s2 2p5 17.42
10 20.180 Neon Ne -249 -246 0.90 1898 18 [He] 2s2 2p6 21.56
11 22.990 Sodium Na 98 883 0.97 2.75 1807 1 [Ne] 3s1 5.14
12 24.305 Magnesium Mg 639 1,090 1.74 2.08 1755 2 [Ne] 3s2 7.65
13 26.982 Aluminum Al 660 2,467 2.70 8.07 1825 13 [Ne] 3s2 3p1 5.99
14 28.086 Silicon Si 1,410 2,355 2.33 27.69 1824 14 [Ne] 3s2 3p2 8.15
15 30.974 Phosphorus P 44 280 1.82 0.13 1669 15 [Ne] 3s2 3p3 10.49
16 32.065 Sulfur S 113 445 2.07 0.05 ancient 16 [Ne] 3s2 3p4 10.36
17 35.453 Chlorine Cl -101 -35 3.21 0.05 1774 17 [Ne] 3s2 3p5 12.97
18 39.948 Argon Ar -189 -186 1.78 1894 18 [Ne] 3s2 3p6 15.76
19 39.098 Potassium K 64 774 0.86 2.58 1807 1 [Ar] 4s1 4.34
20 40.078 Calcium Ca 839 1,484 1.55 3.65 1808 2 [Ar] 4s2 6.11
Explanation: