Write the ground-state electron configurations of the following transition metal ions. (a) Sc3 (b) Cr3 (c) Cu (d) Au

Full electron configuration is shown in the  image attached

Explanation:

In writing electron configuration for ions we first have to know the atomic number of the element. This will tell us the number of electrons in the neutral atom. Then we proceed to remove or add the number of electrons shown by the magnitude of charge on the ion. Then write the electron configuration following this new number of electrons.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements