write down the first 20 elements of periodic table?
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These are the first 20 elements, listed in order:
H - Hydrogen
He - Helium
Li - Lithium
Be - Beryllium
B - Boron
C - Carbon
N - Nitrogen
O - Oxygen
F - Fluorine
Ne - Neon
Na - Sodium
Mg - Magnesium
Al - Aluminum
Si - Silicon
P - Phosphorus
S - Sulfur
Cl - Chlorine
Ar - Argon
K - Potassium
Ca - Calcium
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Answer:
Hydrogen (H)
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
Nitrogen (N)
Oxygen (O) Flurene (F) neone(N) sodium(Na) megnisium(Mg) aluminium (Al) silicon(Si) phosphorus (p) sulphur (s) chlorine (cl) Argon(Ar) potassium (k) calcium(ca)
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