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प्रश्न
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
उत्तर
Across:
(1) Magnesium
(3) Tin
(4) Iodine
Down:
(2) Sodium
(5) Lithium
(6) Neon
(7) Astatine
(8) Iron
(9) Boron
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संबंधित प्रश्न
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
Example for liquid metal is ______.
______ group contains the member of the halogen family.
Consider the following elements 20Ca, 8Or 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be in group 16 of the Periodic Table?
The elements of group 16 are called ______
Which type of elements are poor conductors of heat and electricity?
What type of oxide would Eka– aluminium form?
Identify and name the metals out of the following elements whose electronic configurations are given below.
- 2, 8, 2
- 2, 8, 1
- 2, 8, 7
- 2, 1
Relate the names of the following scientists with the statements given below.
Arranged elements in the increasing order of atomic mass.
Complete the following triads by inserting the missing elements.
Ca, ______, Ba
