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प्रश्न
State whether true or false. If false, correct the statement.
Metals can gain electrons.
विकल्प
True
False
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उत्तर
False.
Correct Statement: Metals tend to lose electrons to attain Noble Gas electron configuration.
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
The non-metal A is an important constituent of our food and most of the fuels around us. A forms two oxides B and C. The oxide B is poisonous whereas oxide C causes global warming.
(a) Identify A, B and C.
(b) To which group of periodic table does A belong?
(c) Name another element which is placed in the same group as A.
Answer the following question.
Write the name, symbol, and electronic configuration of an element X whose atomic number is 11.
How did the early chemists classify elements?
Elements belonging to the same group have the same valency.
What property forms the basis of identification?
The elements A, B, and C belong to groups 1, 14, and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
Complete the following cross word puzzle
Across:
(1) An element with atomic number 12.
(3) Metal used in making cans and member of Group 14.
(4) A lustrous non-metal which has 7 electrons in its outermost shell.
Down:
(2) Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept in kerosene.
(5) The first element of second Period
(6) An element which is used in making fluorescent bulbs and is second member of Group 18 in the Modern Periodic Table
(7) A radioactive element which is the last member of halogen family.
(8) Metal which is an important constituent of steel and forms rust when exposed to moist air.
(9) The first metalloid in Modern Periodic Table whose fibres are used in making bullet-proof vests
Which of the following metals have low melting and boiling point?
Complete the following triads by inserting the missing elements.
Ca, ______, Ba
