Question

classify elements on the basis of lost or gain of electron with example
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Answer 1

Answer:

Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet. In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic compounds.

Explanation:

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Answer 2

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The Periodic Table is a classification system for the elements that make up the matter and materials in our world. Today, there are more than 100 different elements known! Each element has its own name, symbol, atomic number and position on the Periodic Table.

Metals (left side of periodic table) will lose electrons and form positive ions when they react, and nonmetals (right side of periodic table) will gain electrons and form negative ions when they react. An ion is represented by adding a positive or negative sign in superscript to the chemical symbol for the atom.

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