The correct answer is: (c) Atoms of same or different elements can join together to form molecules. Molecules are formed when atoms of either the same element (e.g., O₂) or different elements (e.g., H₂O) bond together. The combination of atoms ...
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Magnesium (Mg) and sulfur (S) combine to form magnesium sulfide (MgS) according to the reaction: Mg + s → From atomic masses: Magnesium (Mg) = 24 g/mol Sulfur (S) = 32 g/mol The ratio of magnesium to sulfur in MgS is:
(a) +3 and -3 respectively. Aluminium (Al) has a valency of +3 because it loses three electrons to achieve stability. Phosphate (PO₄³⁻) has a valency of -3 as it gains three electrons. They combine to form AlPO₄ in a neutral ...