Question

Name the following elements:
1. Three Elements that have a single electron in their outermost shells.
2. Two elements that have two electrons in their outermost shells.
3. Three elements with filled outermost shells.

Answer 1

Hint :We know that the electrons within the outermost shell are called valence electrons and therefore the number of electrons it accepts or donates to make a bond is named the valency of an electron. There are many concepts of outermost shells of an element, such as if the elements are in the same group, then they have the same number of electrons in their outermost shell.

Complete Step By Step Answer:
As we know that the outermost shell isn't filled then to fill the outermost shell, it accepts or donates electrons between other atoms. Also, we can use noble gas for writing the electronic configuration which simplifies it. The valence shell electronic arrangement in this way, there are seven electrons in the peripheral shell of these components. The component passes up the octet arrangement by one electron.
Accordingly, these components watch out to either lose one electron and structure a covalent bond or increase one electron and structure an ionic bond. Consequently, these are extremely receptive non-metals. All the noble gas components will have a totally filled outermost shell. Helium and Argon is a respectable gas, subsequently they have filled the peripheral shell.
Lithium (Li), Sodium (Na), Potassium (K) are the elements having a single electron in their outermost electron.
Magnesium (Mg), Calcium (Ca) has two electrons in the outermost shell.
Helium (He), Neon (Ne), Argon (Ar) are completely filled.

Note :
Remember that the outermost orbital shell of an atom is called its valence shell. These electrons take part in bonding with other atoms. Electrons in the outer shells that are not filled are called valence electrons.