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Write the name. The atom having smallest atomic radius from group 1. - Science and Technology 1

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Question

Write the name.

The atom having smallest atomic radius from group 1.

One Word/Term Answer

Solution

The atom having smallest atomic radius from group 1- Hydrogen (H)

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Chapter 2: Periodic Classication of Element - Write the name

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SCERT Maharashtra Science and Technology 1 [English] 10 Standard SSC
Chapter 2 Periodic Classication of Element
Write the name | Q 11

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Rewrite the following statement after correction, if necessary:

Groups have elements with consecutive atomic numbers.


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 following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):

1             18
a 2 13 14 15 16 17  
    b         c
d           e  

(i) Select the letter which represents an alkali metal.
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(iii) Select the letter which represents a halogen.
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Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electron shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound. This ionic compound is added in a small amount to almost all vegetables and dishes during cooking. Oxides of elements A and B are basis in nature while those of elements E and F acidic. The oxide of element D is, however, almost neutral. Based on the above information, answer the following questions:

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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.

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(a) How is possible valency of an element determined from the electronic configuration of its atom ?

(b) Determine the valency of an element X whose atomic number is 15. 


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Write the name, symbol, and electronic configuration of an element X whose atomic number is 11.


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______ group contains the member of the halogen family.


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What property forms the basis of identification?


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  4. Write a balanced equation when this oxide is dissolved in water
  5. Draw the electron dot structure for the formation of this oxide

The atomic number of an element 'X' is 11.

  1. Write the electronic configuration of X and find its valency.
  2. Write the formula and nature of its oxide.

Element 'X' forms an oxide with the formula X2O3 which is a solid with high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as:


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