Atomic Struture Flashcards
1
Q
what does a nucleus contain?
A
protons +1, neutrons 0
2
Q
what moves around the nucleus?
A
electrons -1
3
Q
what does the atomic number tell you?
A
protons/electrons
4
Q
what does the mass number tell you?
A
protons + neutrons
5
Q
what is an isotope?
A
element that has the same number of protons but a different number of neutrons
6
Q
what is a compound?
A
when two or more elements are chemically joined
7
Q
what is the equation for relative atomic mass?
A
sum of (isotope abundance x isotope mass number)
————————————————————————
sum of abundance of all isotopes
8
Q
when does an element become an ion?
A
when is loses or gains electrons
9
Q
what is an ion?
A
a charged particle, positive or negative
