Na
2
ОО
20 points
What contains the protons and neutrons of an atom and also has...
Na
2
ОО
20 points
What contains the protons and neutrons of an atom and also has most of the mass of an atom?
atomic number
electron cloud
nucleus
the period
3
20 points
An electron
has a positive charge, is inside the nucleus and has almost no mass.
has a neutral charge, is outside the nucleus and has a mass of lau.
Answers: 2
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