science quiz

Matter cant be

matter is anything that takes up space or has

The center of the atom is the

Neils Bohr was a Danish Scientist who discovered

Usually when We measure mass in grams or kilograms.We're dealing with tiny particles atoms we use

A proton and nuetron both have _ amu

An electron has a mass of hole _Amu.

The mass of an atom is the mass of protons and neutrons is _added together(Ignore the electrons).

 An Atomic number of an atom is the number of _ in an atom.

A  molecule are two atoms joined together _.