An atom has no electrical charge because: its subatomic particles have no electrical charges the positively charged neutrons cancel out the negatively charged electrons the negatively charged neutrons cancel out the positively charged protons there are as many positively charged protons as negatively charged electrons

Its subatomical particles have no electrical charges

There are as many positively charged protons as negatively charged electrons. If the both charges are the same, they cancel each other out making the atom have a neutral charge. A neutral charge can be written as 0. Hope that helps!

I'm not sure but i will try to find out

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.