Sub: Science 1 Chapter 2 Q.1.Answer the following Questions 1)Taking in to consideration the period of the elements given below answer the following questions elements O B C N Be Li Atomic radius 66 88 77 74 111 152 a. Arrange the above elements in a decreasing order of their atomic radii. 1 a. Arrange the above elements in a decreasing order of their atomic radii. b. State the period to which the above elements belong c. Why this arrangement of elements is similar to the above period of modern periodic table .d. Which of the above elements have the biggest and the smallest atom? e. What is the periodic trend observed in the variation of atomic radius while going from left to right within a period. 2) In Dobereiner's triads Li,Na,K the atomic masses of Lithium and Potassium are 6.9 and 39.1 respectively,then what will be the atomic mass of sodium. .3) Write the names from the description? a) The period with electrons in the shells K,L and M b) The family of nonmetals having valency one c) The family of metals having valency one.
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the atomic radii of the element of second period are given below second period ... (a) Arrange these elements in decreasing order of their atomic radii. ... (d) From the above data, infer how the atomic size or atomic radius of the ... Li. Be. B. C. N. O. F. 152. 111. 88. 77. 74. 66. 64 ... All Questions Ask Doubt.
Taking into consideration the period of the elements given below, answer the following questions : Elements, Atomic Radius (pm). O, 66. B, 88. C, 77. N, 74. Be, 111. Li, 152. 1) Arrange the above elements in a decreasing order of their atomic radii. 2) State the ... Is there an error in this question or solution? Advertisement.
Explanation:
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Explanation:
1.O N C B Be Li
2. They belong to the 2nd period.
3. Li is the largest atom and O is the smallest atom.
4.The atomic mass of Na is 23.0.
5.O: oxygen. B: Boron. Be : Beryllium
N : Nitrogen. C : Carbon. Li: Lithium
6.period with shells K,L,M is 3
7.Nonmetals valency 1 : Halogen
8. Metals with valency 1 and 2 : Alkali earth metals and Alkaline earth metals.
9. The trend observed is : atomic radius goes on decreasing.
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