Question

how can we know that an element is metal metalloid and non metal from its atomic number if the picture is not given​

Answer 1

Answer:

if it's atomic no is lies between 1,2,3 so it is metal and

if it's atomic no lies between 5,6,7 so it is non metal but it's atomic no is 4 so it is metalloid we check by

Explanation:

this formula 2,8,8,16