Mber of
rotons
number of | atomic mass
neutrons number number
20 та тв
element
(symbol)
20
de
19
the periodic table, complete the table to describe each atom. type in your

Ur e n d is not real

It was ernest rutherford

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.