atoms

Cards (16)

what is the radius of an atom
about 0.1 nanometres (1 × 10 ^ -10m)
where is the nucleus
in the middle of the atom
what does the nucleus contain
protons and neutrons
what is the radius of the nucleus
around 1×10^-14m
why does the nucleus have a positive charge
because of the protons that are present
where is most of the mass of an atom concentrated
in the nucleus
where do electrons move about
in electron shells
what is the overall charge of an electron
negative
what does the volume of an electron‘s orbit determine
the size of the atom
what is the mass of an electron
negligible
what is the overall charge of an atom
neutral
why does an atom have a neutral charge
they have the same number of protons and electrons which would cancel out
what does the nuclear symbol of an atom tell you
it’s atomic number and mass number
what does the atomic number of an atom tell you
how many protons there are
what does the mass number of an atom tell you
the total number of protons and neutrons present within an atom
how do you calculate the number of neutrons in an atom
mass number - atomic number