Question

Number of electrons lost by atom of group 3A equal??

Answer 1

Answer:

3 electrons.because 3A group valency is +3

Answer 2

Answer:

The number of electrons lost by atom of group 3A equal is 3.

Explanation:

Group 3A (or IIIA) elements:

• Group 3A of the periodic table is the boron group, but normally called aluminum group.

• It includes the metalloid boron (B), and the metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl).  
• The general electronic configuration of group 3A elements is $ns^2p^1$, where n is the number of the outermost orbital.
• The configuration shows that there are two electrons in the outermost s orbital and one electron in the p orbital.
• Metals are always electropositive and hence they tend to give up their valence electrons.
• Since the group 3A metals have  three valence electrons in their outermost orbitals, therefore they lose 3 electrons to form positively charged ions.

Therefore, the number of electrons lost by atom of group 3A equal is 3.

For more info:

https://brainly.in/textbook-solutions/q-valence-electrons

https://brainly.in/question/20670158