Which of the following is CORRECT for \( \mathrm{Na}(Z=11) \) \( \m...

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Which of the following is CORRECT for \( \mathrm{Na}(Z=11) \)
\( \mathrm{P} \)
(1) It's electronegativity on Pauling's scale \( =2.1 \)
W
(2) Number of vacant orbitals in its valence shell is 8
(3) It is a \( 2^{\text {nd }} \) period element
(4) It's magnetic moment (spin only) \( =\sqrt{8} \mathrm{~B} \cdot \mathrm{M} \)
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