A. Fe B. An alkali metal C. Silver D. Mercury
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A. Oxygen B. Water C. Moisture D. All of these
A. d-block B. f-block C. Radioactive series D. None of these
A. d-block elements B. p-block elements C. s-block elements D. f-block elements
A. The same effective nuclear charge B. The imperfect shielding on outer electron C. The appreciable shielding on outer electrons D. None of these
A. Oxide B. Carbonate C. Nitride D. Hydroxide
A. 1.4 kg B. 2.4 kg C. 3.4 kg D. 5 kg