2.1 Periodic Table Flashcards
1
Q
Protons
A
+1
heavy
in the nucleus
determines identity
2
Q
Nuetrons
A
0, in nucleus, heavy, holds together in nucleus
3
Q
Electrons
A
-1
outside of nucleus
responsible for reactivity
virtually zero
4
Q
Valence electrons
A
energy levels participate in reacting
5
Q
Isotope
A
same protons different mass
6
Q
Isotopes can be used as…
A
tracers
7
Q
They react in the same way during chemical reactions
A
Isotopes
8
Q
How do you find the Element?
A
The number of protons
9
Q
How do you find the mass number
A
Adding protons and the neutrons
10
Q
A
