GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 electrons
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8 electrons
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18 electrons
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32 electrons
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Detailed explanation-1: -The third shell holds 18 electrons; 2 in a 3s orbital; 6 in three 3p orbitals; and 10 in five 3d orbitals. The fourth shell holds 32 electrons; 2 in a 4s orbital; 6 in three 4p orbitals; 10 in five 4d orbitals; and 14 in seven 4f orbitals.
Detailed explanation-2: -second and third periods can accommodate 8 and 18 electrons respectively. Since their outermost shells can contain only 8 electrons, there are only 8 elements in boththe periods.
Detailed explanation-3: -Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals. The fourth and higher levels also have an f sublevel, containing seven f orbitals, which can hold a maximum of 14 electrons.
Detailed explanation-4: -Note: The third energy level can actually hold up to 18 electrons, so it is not really filled when it has 8 electrons in it.
Detailed explanation-5: -Palladium is the only element in the periodic table that has 18 electrons in its outermost shell.