It is a period 3 element.
Period#5
5
The abbreviation for number is No. (has a period at the end). Numbers plural is Nos. (again a period at the end).
Argon is a period 3 element.
You need to know . . . > the total number of dollars during the period of interest, > the total number of stores, > the number of weeks in the period of interest. When you have collected that information . . . > Divide the total number of dollars by the total number of stores. then > Divide the result by the number of weeks in the period of interest. The result is dollars per store per week during that period.
argon's atomic number is 18
There are three natural isotopes.
Argon is very unreactive as it is a noble gas. Its common oxidation number is zero.
Argon atoms have 18 protons which is similar to the number of electrons.
Ar
Argon is a non metal element. Atomic mass of it is 39.94.
It is 87.3 K.
All I know is that it's nearly 20
Because of its atomic number. The atomic number is a reference to how many protons an element has. Argons atomic number is 18, so it has 18 protons. Potassiums is 19.
Atomic number of argon is 18, and it belongs to group 18 , a group of noble gases , it has 8 electrons in the outermost orbit and therefore a zero valancy.
Helium, Xenon, Neon, Krypton, and Radon.
Argon is atomic number 18. It would therefore have 18 protons. Having 18 protons would mean that Argon must also have 18 electrons.