atomic structure Flashcards
what makes up the nucleus
proton and neutron
what makes up the outer shell
electron
relative charge of proton
+1
relative charge of neutron
0
relative charge of electron
-1
relative mass of proton
1
relative mass of neutron
1
relative mass of electron
1/1836
where is the proton in a atom
nucleus
where is the neutron in a atom
nucleus
where is the electron in a atom
orbit in the shell
what is the atomic number
this is the number of protons in the nucleus of an atom of an element
what is the mass number
this is the number of proton plus neutrons in the nucleus of an atom in an element
why is an atom overall neutral
same number of protons and electrons, their charges cancel out
what is an isotope
isotope are atoms of an element which have the same number of protons but have a different number of neutrons