Question

in the modern perodic tabel which are the metals non metals and metallodis among the first twenty elements

Answer 1

He -Non 
Li - metal 
Be - metal 
B - metalloid 
C - Non 
N - Non 
O - Non 
F - Non 
Ne -Non 
Na -Metal 
Mg - Metal 
Al - Metal 
Si - metalloid 
P - non 
S - Non 
Cl - Non 
Ar - Non 
K - Metal 
Ca - Metal

Answer 2

     In modern periodic table, which are the metals, non metals and metalloids among the first 20 elements?Ans.  In the modern periodic table, among the first 20 elements, following are the metals, non – metals and metalloids.Metals are 1A group elements;Non  metals are
Hydrogen (H)Helium (He)Carbon (C)Nitrogen (N)Oxygen (O)Fluorine (F)Neon (Ne)Phosphorus (P)Sulphur (S)Chlorine (Cl)Argon (Ar)

Metalloids are :Boron (B)Silicon (Si)