The Atom and Isotopes Flashcards
1
Q
what is an ion
A
an atom that has lost or gained electrons
2
Q
why does an atom have no overall charge
A
it has an equal number of protons and electrons
3
Q
what is an isotope
A
an atom of an element with the same number of protons but different number of neutrons
4
Q
difference between carbon 12 and carbon 14
A
carbon14 has two more neutrons
5
Q
what does the atomic number tell us
A
the number of protons
6
Q
give the mass of a proton, neutron and electron
A
proton-1
neutron-1
electron- practically 0
7
Q
what does the mass number of an atom tell us
A
the number of protons and neutrons in the nucleus
