GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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+3
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+5
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-3
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-5
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Detailed explanation-1: -If 3 or less than 3 electrons exist in the valence shell, then the element will lose electrons to gain stability. Lose of electrons is characterized by the formation of cations. Cations are the species with positive charge. So, positive charge will be formed on the ion.
Detailed explanation-2: -The Group 3A metals have three valence electrons in their highest-energy orbitals (ns2p1). They have higher ionization energies than the Group 1A and 2A elements, and are ionized to form a 3+ charges.
Detailed explanation-3: -Al will form a cation with a charge of 3+: Al3+, an aluminum ion.
Detailed explanation-4: -Answer and Explanation: If an atom needs 1 to 3 valence electrons, it will lose them to become a charged ion and form an ionic bond with another atom. Most atoms need eight valence electrons to fill their outer shell and become stable.
Detailed explanation-5: -Hence, Aluminium(Al) is an element in the third period having three valence electrons.