Atoms Flashcards
1
Q
What is the mass and charge of a proton?
A
Mass= 1 Charge= +1
2
Q
What is the mass and charge of a neutron?
A
Mass = 1 Charge = 0
3
Q
What is the mass and charge of an electron?
A
Mass = 1/2000 Charge = -1
4
Q
How do we find the mass number of an atom?
A
Number of protons + number of neutrons
5
Q
What is an isotope?
A
The atoms of an element with a different number of neutrons, they have the same proton number, but different mass numbers
6
Q
How do we compare the masses of atoms?
A
By measuring them relative to atoms of carbon-12
7
Q
how do we work out the relative formula mass of a compound?
A
By adding up the relative atomic masses of the elements in it
8
Q
What is one mole of any substance?
A
Its relative formula mass, in grams
