Book 1 Flashcards
1
Q
How many different elements are there?
A
100
2
Q
what is the difference between the metals at the bottom than the top
A
The bottom ones are the most reactive
3
Q
What is the relative charge and relative mass of protons neutrons electrons
A
Name of particle relative charge mass
proton +1 1
neutron 0 1
electron -1 0.0005
4
Q
what is the protons equal to?
A
number of electrons
5
Q
what are the atoms called with different amount of neutrons?
A
isotopes
