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प्रश्न
Write the name.
The atom having smallest atomic radius from group 1.
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उत्तर
The atom having smallest atomic radius from group 1- Hydrogen (H)
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
Why do we classify elements?
An element Y is in second period and group 16 of the periodic table:
(i) Is it a metal or non-metal?
(ii) What is the number of valence electrons in its atom?
(iii) What is its valency?
(iv) What is the name of the element?
(v) What will be the formula of the compound formed by Y with sodium?
An element X from group 2 of the periodic table reacts with an element Y from group 17 to form a compound.
(a) What is the nature of the compound formed?
(b) State whether the compound formed will conduct electricity or not.
(c) Give the formula of the compound formed.
(d) What is the valency of element X?
(e) How many electrons are there in the outermost shell of an atom of element Y?
The elements A, B and C belong to groups 1, 14, and 17 respectively of the periodic table.
(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
Give a reason why elements need to be properly classified.
How did the early chemists classify elements?
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
______ group contains the member of the halogen family.
Moseley’s periodic table is based on atomic mass.
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
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 of the following property will be common in group 1 elements?
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
