6. What is the chemical formula for carbon tetrachloride?*
four answer
7. What is the chemical formula for dihydrogen dioxide? Also commonly
called hydrogen peroxide.
Your answer
8. What is the chemical formula for selenium hexoxide? *
point

6. CCl_4

7. H_2O_2

8. SeO_6

Explanation:

They are all nonmetal chemical formulas, so they call for the nonmetal naming rules. (It's basically just memorizing the roots: mono, di, tri, tetra, penta, hexa, septa, octa, nona, deca).

These are the rules for molecular/covalent naming:

-First element starts with the element name

-Second element has -ide

-Use prefixes to show the nuber of atoms of each part

-Don't use "mono" on the first element.

-If there is a word with "ao"" or "oo", just turn it into "o"

Ex: CaO is not "calcium monooxide", it's just "calcium monoxide"

the solar system used to have much dust particles option no d

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.