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Maharashtra State BoardSSC (English Medium) 10th Standard

Write the name. The group of elements having electronic configuration 2, 2. - Science and Technology 1

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Question

Write the name.

The group of elements having electronic configuration 2, 2.

One Word/Term Answer
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Solution

The group of elements having electronic configuration 2, 2- Group 2

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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 12

RELATED QUESTIONS

An element has its electron configuration as 2, 8, 2. Now answer the following question.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble? (Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)


Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
 4Be, 6C, 8O, 5B, 13Al Which is the most electropositive element among these?


Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

 6C, 3Li, 9F, 7N, 8O Which of the above elements has the highest nonmetallic character?


An element has its electron configuration as 2,8,2. Now answer the following questions.
i. What is the atomic number of this element?
ii. What is the valency of this element?
iii. What is the group of this element?
iv. To which period does this element belong?
v. With which of the following elements would this element resemble?

`_7N ,  _4Be  ,  _18Ar  , _17CL`


An element has its electron configuration as 2, 8, 2. Now answer the following question. 

What is the atomic number of this element?


An element has its electron configuration as 2, 8, 2. Now answer the following question. 

With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)


_______ is the outermost shell for elements of period 2.


Which pair of atomic numbers represents elements in the same group?


Match the columns.

Column A Column B
1) Alkaline earth metals a) Group 18
2) Alkali metals b) Group 17
3) Halogen c) Group 2
4) Noble gas d) Group 1
  e) Group 14

The number of electrons in the outermost shell of an atom determines the _______.


Write the name.

The element having stable electron configuration from the third period.


The number of shells decreases in a group from top to bottom.


Complete the following chart.

Shell n 2n2 Electron holding
capacity
K ______ 2 × 12 2
L 2 ______ 8
______ 3 2 × 32 18
N 4 2 × 42 ______

Find the period in which these elements can be placed.

4Be, 17Cl, 2He, 13Al


Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.

  1. What is the atomic number of element A?
  2. Find the group to which this element belongs.

Identify periods of elements and blocks of elements from given electronic configuration?

  1. 2, 8, 2
  2. 2, 8, 7
  3. 2, 1

XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.

  1. Determine the position of the element X and Y periodic table.
  2. X and Y belongs to which of the following: metals, nonmetals or metalloids?
  3. From which block the elements X and Y are?
  4. Determine the electronic configuration and valency of these elements.

Observe the periodic table given below and write the answers of the questions.

  1. Write the name and valencies of the elements in 3rd row.
  2. Classify the elements in this row as metal, nonmetal and metalloids.
  3. Which block does nonmetals belong to?
  4. Write name of any two metalloid elements.

Make a chart which shows the name of the element, valency, atomic number, electronic configuration in the 2nd row of the modern periodic table and arrange these elements in ascending order of atomic mass.


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