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• Q. The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of
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• Q. The atomic numbers of four elements A, B, C and D are 6, 8, 10 and 12 respectively. The two elements
• Q. A gas used for artificial ripening of fruits.
• Q. In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of th
• Q. Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14.
• Q. An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?
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• Q. Fill in the blank: ………….. can be retarded by storing foods away from light.