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welcome to moomoomath and science in

this video let's learn to use the

periodic table in order to find an

elements name symbol number of protons

neutrons and electrons take a look at

this chart let's figure out how to find

the missing information each box of the

periodic table contains information

about them element let's look at carbon

first you will see the symbol it's a one

or two letter abbreviation derived from

the elements English or Latin name below

that is the elements common name above

that is the atomic number this equals

the number of protons in the nucleus as

well as the number of electrons to find

the electrons take the atomic number and

subtract the charge an atom can gain or

lose electrons and become what is known

as an ion which is nothing more than a

charged atom adding or removing

electrons from an atom does not change

which element it is below that is the

atomic mass and this is the weighted

average of the masses of all the

elements isotopes if you round the

atomic mass to the nearest whole number

it gives you the mass number and that's

the sum of the number of protons and

neutrons in a specific isotope so let's

get started

up first we have we're gonna find the

element this symbol the atomic number

number protons neutrons electrons and

the mass number so first we have silver

if you find silver it is a symbol of a G

it has an atomic number of 47 so that

means it has 47 protons let's jump over

to the electrons and each of these

elements has a 0 charge so 47 minus 0

equals 47 so it will have 47 electrons

now let's find the mass number we will

round 107 point 8 7

and we will round that to 108 now to

find the neutrons we take the mass

number which is 108 and then we are

going to subtract the number of protons

which is 47 and when you do that 108

minus 47 equals 61 so we'll have 61

neutrons next let's look at potassium

potassium is as a symbol of K next it

has an atomic number of 19 so that means

it has 19 protons in order to find the

electrons remember it has a zero charge

so 19 minus zero is 19 now let's get the

mass number if you take 39 point zero

nine eight you will round it to 39 so it

has a mass number of 39 and then 39

minus 19 which is the number of protons

gives you 20 neutrons next let's look at

10 10 has a symbol of SN and atomic

number of 50 so it has 50 protons next

let's skip over to the electrons it's a

zero charge so 50 minus zero is 50 the

mass number one one eight point seven

one will be rounded to 119 and then 119

minus 50 is 69 and that's the number of

neutrons and finally we have fluoride

fluoride has a symbol F excuse me

fluorine has a symbol F an atomic number

of nine that means it has nine protons

has a zero charge so the electrons will

be nine it has a mass number of 19

because I round up to 19 and then 19-9

gives you the number of neutrons which

is 10 if you'd like to know more about

the periodic table this playlist will

help and as always thanks for watching

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