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The most abundant element in the universe is element A. This is gas at room temperature and acts as metal when in solid state. It is also a promising source of "clean" fuel on Earth. Moreover, it is the only element that can exist without neutrons.1. Element A is _______a. Goldb. Mercuryc. Calciumd. Hydrogen2. How many protons does A has?a. 1b. 2c. 3d. 53. The name of the last element in the group beside element 's A group is _____.a. Franciumb. Radiumc. Rutherfordiumd. Dubnium4. How is element A denoted?a. Nb. Scc. Hd. Ti5. A swig of element A's oxide promoted by alternative-health devotees can kill people . Name the oxide.a. Nitric oxideb. Hydrogen peroxide |
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Answer» 1. d. Hydrogen 2. a. 1 3. b. Radium 4. c. H 5. b. Hydrogen peroxide |
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