Which is a formula of a binary compound?

a. baso4
b. bipo4
c. mgcl2
d. mg(clo)2

C. MgCl2

Explanation:

Binary compound are chemical compounds composed of 2 different elements. Elements are substance that can not be separated. The elements that makes up a binary compound are not the same.   A good example of a binary compound is NaCl . The sodium chloride compound has one atom of sodium and one atom of chlorine. Sodium and chlorine combined together to form a binary compound known as sodium chloride.

Among the options, MgCl2 pronounce as Magnesium chloride contains two distinct elements . But the number of atom of Magnesium is one while the number of atom of chlorine is 2. Both distinct elements combine together to form a binary compound.

All other option has more than two elements that makes up the compound.  

answer///carbon;

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.