in this lesson are going to look at the properties of periodic table
There are two important things, one of them is called the periods.
The periods are basically, they are horizontal rows on the periodic table, going across. So we have first period, ok.
Period 1, period 2, 3 ,4 and so long.
Now, a quick way to remember the period, horizontal or horizontal going across like this.
if we look at the H, within the H thereś line going left to right. Thereś a horizontal going left to right. So that how you the  horizontal are periods.
The periods are horizontal rows going across the periodic table and we look at groups,
groups are the vertical columns going down. so we have group one group two and so on.
now one quick way to memorize that is verticals is up and down if you look at the letter V itself
So V is made up of two lines going up and down.  you have one line going gown and you have another going up
so V for verticals going up and down and groups are basically vertical columns going up and down
Now lets look at the individual elements box on the periodic table.
There are very important information by the elements based on information given on the PT
first of all, we have this number right here, the number on top.
that is your atomic number each element on the periodic table has its unique atomic number
And this atomic number equal to the number of protons
remember this proton is a positive subparticles , located in the nucleus right.
Now we have a symbol for an element , an atomic number is unique to an specific element
So, therefore, it's unique to the element symbol as well.
Then we have the name of an element, again if we have the name of the element we would know the symbol of
an element, we also know the atomic number of a element
and also we know the number of protons of an element
Lastly, we have the atomic mass of an element.
now this is known as the average atomic mass of an element.
This is not the same thing as the mass of a number of  isotope which we will cover later.
Because the mass number of an isotope is equal to the mass number of protons
Plus number of neutrons only, specify  for the isotopes
One last thing you need to know is that if an atom is neutral that means the net charge is 0, ok
It has no charge at all , you need to know that the atomic number is equaly to the number of protons.
and is also equal to the number of electrons,is the positive of protons will cancel out with a negative of an electron.
so again it will happen in a neutral atom.
