The number of unpaired electrons in an atom of an element 8Q is _______?
A. 2 B. 4 C. 6 D. 8 Correct Answer: Option A A. 2The alkaline earth metals have similar chemical properties because________?
A. They are in the same period B. Their salts are colourless C. They have the same number of valence electrons D. They are very reactive Correct Answer: Option C C. They have the same number of valence electronsWhich of the following halogens is solid at room temperature?
A. Bromine B. Chlorine C. Flourine D. Iodine Correct Answer: Option D D. IodineThe gas given off when ethanol reacts with sodium is?
A. Carbon(IV)oxide B. Hydrogen C. Methane D. Oxygen Correct Answer: Option B B. HydrogenProducts
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