Why is potassium placed in the periodic table where it is?

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d