How would I combine ions?

like how would Sr be combined as a positve or negative ion?
I DON'T GET IT!

Sr(+2) + 2 Cl- --> SrCl2 is one example

Combining ions involves the formation of chemical compounds, which are created by the exchange or sharing of electrons between atoms. In order to understand how Sr (strontium) can be combined as a positive or negative ion, we need to consider its electron configuration.

Strontium (Sr) has an atomic number of 38, meaning it has 38 protons and 38 electrons in its neutral state. The electron configuration of Sr is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s², with the valence electrons occupying the 5s² energy level.

To become a positive ion (cation), an atom loses one or more electrons from its outer energy levels. In the case of Sr, it can lose its two valence electrons from the 5s² level to achieve a stable, filled electron configuration like the noble gas, krypton (Kr). This results in the formation of Sr²⁺ ions, which have a charge of +2.

On the other hand, to become a negative ion (anion), the atom gains one or more electrons to fill its valence energy levels. However, Sr does not readily gain electrons because it requires a significant amount of energy to fill its 4d and 5p energy levels. Instead, other elements tend to gain electrons from Sr to attain stability.

So, in summary, Sr readily loses its two valence electrons to become Sr²⁺ ions, which carry a charge of +2. It is less likely for Sr to become a negative ion on its own, as it is more inclined to lose electrons rather than gain them.

It's important to note that the combination of ions usually involves reacting two or more different elements together, rather than combining two of the same elements.