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प्रश्न
State whether true or false. If false, correct the statement.
Metals can gain electrons.
पर्याय
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
An element X is in group 2 of the periodic table what will be the formula of its oxide?
Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl−. What is this number?
______ group contains the member of the halogen family.
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
Which one of the following does not increase while moving down the group of the periodic table?
Which type of elements are poor conductors of heat and electricity?
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
An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.
- Identify the element X. How many valence electrons does it have?
- Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?
- Draw the electron dot structure for ammonia and what type of bond is formed in it?
Relate the names of the following scientists with the statements given below.
Arranged elements into groups containing three elements each.
