Question

For each of the following atomic numbers, use the periodic table to write the formula (includingthe charge) for the simple ion that the element is most likely to form in ionic compounds.
a. 13
b. 34
c. 56
d. 7
e. 87
f. 35

Short answer

The formula for the each atomic number has been written using periodic table.

Step-by-step solution

Formula for the atomic number of 13

If the atomic number is 13, then the atom has proton number of 13. This element comes as Aluminium and its symbol is Al. It forms only ion of ${\mathrm{Al}}^{3+}.$The atom can be represented as${}_{13}{}^{27}\mathrm{Al}^{+3}.$

Formula for the atomic number of 34

If the atomic number is 34, then the atom has proton number of 34. This element comes as Selenium and its symbol is Se. It forms only ion of ${\mathrm{Se}}^{-2}.$The atom can be represented as${}_{34}{}^{79}\mathrm{Se}^{2-}.$

Formula for the atomic number of 56

If the atomic number is 56, then the atom has proton number of 56. This element comes as Barium and its symbol is Ba. It forms only ion of ${\mathrm{Ba}}^{2+}.$The atom can be represented as${}_{56}{}^{137}\mathrm{Ba}^{+2}.$

Formula for the atomic number of 7

If the atomic number is 7, then the atom has proton number of 7. This element comes as Nitrogen and its symbol is N. It forms only ion of ${\mathrm{N}}^{-3}.$The atom can be represented as${}_7{}^{14}{\mathrm{N}}^{-3}.$

Formula for the atomic number of 87

If the atomic number is 87, then the atom has proton number of 87. This element comes as Francium and its symbol is Fr. It forms only ion of${\mathrm{Fr}}^{1+}.$ The atom can be represented as${}_{87}{}^{223}\mathrm{Fr}^{+1}.$

Formula for the atomic number of 35

If the atomic number is 35, then the atom has proton number of 35. This element comes as Bromine and its symbol is Br. It forms only ion of${\mathrm{Br}}^{1-}.$ The atom can be represented as${}_{35}{}^{80}\mathrm{Br}^{-1}.$