nature of molecules Flashcards
1
Q
all mater is composed of what?
A
atoms
2
Q
what charge are protons
A
positive
3
Q
what charge are neutrons
A
neutral
4
Q
what charge are electrons
A
negative
5
Q
what is the atomic number ?
A
number of protons same atomic number= same element
6
Q
what is the atomic mass ?
A
sum of protons , neutrons and electrons
7
Q
what are isotpes?
A
these are the same element but different atomic mass
ex. hydrogen (h+) 1 proton and 1 electron (noble gasses)
8
Q
what is a neutral atoms
A
same protons and elctrons
9
Q
what are ions
A
charged atoms
10
Q
what are cations
A
more protons (positive )
11
Q
what are anions ?
A
more electrons (neg)
