P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily?
A. P B. C C. R D. S Correct Answer: Option D D. SGiven that the electronic configuration of an element X is 1s² 2s² 2p6 3s² 3p4, it can be deduced that X?
A. belongs to group VI in the Periodic Table B. belongs to periodic Table C. contains 3 unpaired electrons in the ground state D. has atomic number 27 Correct Answer: Option A A. belongs to group VI in the Periodic TableWhat is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?
A. 32 B. 22 C. 20 D. 10 Correct Answer: Option B B. 22Allotropes of an element differ in their?
A. physical properties B. chemical properties C. mass numbers D. electronic configuration Correct Answer: Option A A. physical propertiesA plastic that cannot be softened by heat is described as?
A. thermosetting B. non-biodegradable C. thermoplastic D. malleable Correct Answer: Option A A. thermosettingProducts
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