How many atoms in 15ZnSO4

90

Explanation:

To find the number of atoms in a formula, you have to add the number of each element. To find the number of each element, multiply the coefficient by the subscript for each individual element. If an element does not have a subscript, it is equal to 1.

Zn = 15x1 = 15

S = 15x1 = 15

O = 15x4 = 60

60+15+15 = 90 atoms.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72