It is in period 3
It is in group 17
It is a chlorine atom because it has 17 electrons which means the atomic number is 17
A, B and D should be the ones you should check
The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. The dimensionless standard atomic weight instead refers to the AVERAGE of atomic mass values of a typical naturally-occurring mixture of isotopes for a sample of an element.
You can count it by yourself using formula
m = ({first isotopic distribution%}× {first atomic.mass})+ ({second isotopic distribution%}× {second atomic.mass}) / {100}
Answer:
1.707599191 atm
Explanation:
44.5 divided by 25.2 = 1.765873 (i used calculator to double check)
1.765873 x 0.967 = 1.707599191 (used calculator)
