Atomic Structure Flashcards
1
Q
proton charge…
A
+1
2
Q
neutron charge…
A
0
3
Q
electron charge…
A
-1
4
Q
proton mass…
A
1
5
Q
neutron mass…
A
1
6
Q
electron mass…
A
1/2000
7
Q
define mass number
A
number of protons and neutrons
8
Q
define atomic number
A
number of protons
9
Q
what does the group number tell you?
A
the number of outer shell electrons
10
Q
what does the period tell you?
A
the number of electron shells
11
Q
describe the reactivity of Noble gases
A
unreactive
12
Q
give example of Noble gases
A
helium, neon, argon
13
Q
why is the reactivity of Noble gases the way it is?
A
because it has a full outer shell of electrons
14
Q
define isotope
A
atoms of the same element with the same number of protons but different number of neutrons
15
Q
why do isotopes have the same chemical properties
A
because the electron configuration is the same
