When atoms lose or gain electrons, they become what are called ions. Atoms that can lose two electrons, such as Calcium, can form molecules with two chemical bonds: In transition metal atoms and in many heavier elements, the octet rule does not apply.
Similarly, how many electrons can an element have?
In an atom, the electrons spin around the center, also called the nucleus. The electrons like to be in separate shells/orbitals. Shell number one can only hold 2 electrons, shell two can hold 8, and for the first eighteen elements shell three can hold a maximum of eight electrons.
How many electrons does lithium have to gain or lose?
Others gain electrons and become negative ions. For example: A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion.
How many electrons will boron gain or lose?
Borane is the name scientists have when one boron (B) atom bonds to three hydrogen (H) atoms. You can see that each of the hydrogen atoms now has two electrons, filling their outer shell. The boron atom has lost its three extra electrons, giving it a full shell as well.