Group 18 are stable because thier outermost shell ocuppied with full of electrons and its chemically inert
The key morphological feature used to classify organisms as mammals is <span>mammary glands.
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Magnesium :
<span>[Ne] 3s²</span>
Answer A
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FeBr3(aq) + NaOH(aq) = FeOH(s) + NaBr3(aq)
