Match the elements to their periodic table groups based on their uses or properties. group 3-12
group 1
group 17
group 2

1. Element is used as a disinfectant
2. Element important for the proper functioning of the human body
3. Element always stored under oil.
4. Compounds of this element are used in the manufacturing of paints.

Edmentum forensics

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

i don,t know so just answer mine