Mass and atomic number
The Atomic Number depends on the number of protons an element has
The mass number depends on the number of protons and neutrons an elements has
So for example the element Bromine, It has 35 protons, 45 neutrons, and 35 electrons.
So since it has 35 protons we know that its atomic number is 35
And to find out the atomic mass, we have to add 35 and 45 together because the protons+Electrons= Mass so 35+45= 80 :
The mass number depends on the number of protons and neutrons an elements has
So for example the element Bromine, It has 35 protons, 45 neutrons, and 35 electrons.
So since it has 35 protons we know that its atomic number is 35
And to find out the atomic mass, we have to add 35 and 45 together because the protons+Electrons= Mass so 35+45= 80 :
Here's another example
The element Krypton (Kr) has 36 protons, 47 neutrons and 36 electrons
The atomic number is 36 because that's how many protons it has
And its mass is 83,80 because the protons (36)+ neutrons (47)= 83.80
The element Krypton (Kr) has 36 protons, 47 neutrons and 36 electrons
The atomic number is 36 because that's how many protons it has
And its mass is 83,80 because the protons (36)+ neutrons (47)= 83.80