# Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 - Periodic Classification of Element [Latest edition]

## Chapter 2: Periodic Classification of Element

[Pages 28 - 29]

### Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board Chapter 2 Periodic Classification of Element [Pages 28 - 29]

Q 1 | Page 28

Rearrange the columns 2 and 3 so as to match with the column 1.

 Column 1 Column 2 Column 3 i. Triadii. Octaveiii. Atomic numberiv. Periodv. Nucleusvi. Electron a. Lightest and negatively charged particle in all the atomsb. Concentrated mass and positive chargec. Average of the first and the third atomic massd. Properties of the eighth element similar to the firste. Positive charge on the nucleusf. Sequential change in molecular formulae 1.Mendeleev 2. Thomson 3. Newlands 4. Rutherford 5. Dobereiner . Moseley
Q 2.1 | Page 28

Choose the correct option and rewrite the statement.
The number of electrons in the outermost shell of alkali metals is .....
(i) 1 (ii) 2 (iii) 3 (iv) 7

Q 2.2 | Page 28

Choose the correct option and rewrite the statement.
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ....
(i) Group 2      (ii) Group 16
(iii) Period 2    (iv) d-block

Q 2.3 | Page 28

Choose the correct option and rewrite the statement.
The molecular formula of the chloride of an element X is XCl. This compound is a solid having a high melting point. Which of the following elements be present in the same group as X.

• Na

• Mg

• Al

• Si

Q 2.4 | Page 28

Choose the correct option and rewrite the statement.
In which block of the modern periodic table are the nonmetals found?
(i) s-block       (ii) p-block
(iii) d-block    (iv) f-block

Q 3.1 | Page 28

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

What is the atomic number of this element?

Q 3.2 | Page 28

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

What is the group of this element?

Q 3.3 | Page 28

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

To which period does this element belong?

Q 3.4 | Page 28

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)

Q 4.1 | Page 29

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
3Li, 14Si, 11Na, 15P Which of these elements belong to be period 3?

Q 4.2 | Page 29

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

1H, 7N, 20Ca, 16S, 4Be, 18Ar Which of these elements belong to the second group?

Q 4.3 | Page 29

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

7N, 6C, 8O, 5B, 13Al Which is the most electronegative element among these?

Q 4.4 | Page 29

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?

Q 4.5 | Page 29

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
11Na, 15P, 17Cl, 14Si, 12Mg Which of these has largest atoms?

Q 4.6 | Page 29

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
19K, 3Li, 11Na, 4Be Which of these atoms has smallest atomic radius?

Q 4.7 | Page 29

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
13Al, 14Si, 11Na, 12Mg, 16S Which of the above elements has the highest metallic character?

Q 4.8 | Page 29

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?

Q 5.1 | Page 29

Write the name and symbol of the element from the description.
The atom having the smallest size.

Q 5.2 | Page 29

Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.

Q 5.3 | Page 29

Write the name and symbol of the element from the description.
The most electronegative atom.

Q 5.4 | Page 29

Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.

Q 5.5 | Page 29

Write the name and symbol of the element from the description.
The most reactive nonmetal.

Q 6.1 | Page 29

Write a short note.
Mendeleev’s periodic law.

Q 6.2 | Page 29

Write a short note.
Structure of the modern periodic table.

Q 6.3 | Page 29

Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.

Q 7.1 | Page 29

Write scientific reason.
Atomic radius goes on decreasing while going from left to right in a period.

Q 7.2 | Page 29

Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.

Q 7.3 | Page 29

Write scientific reason.
Atomic radius goes on increasing down a group.

Q 7.4 | Page 29

Write scientific reason.
Elements belonging to the same group have the same valency.

Q 7.5 | Page 29

Write scientific reason.
The third period contains only eight elements even through the electron capacity of the third shell is 18

Q 8.1 | Page 29

Write the name from the description.
The period with electrons in the shells K, L and M.

Q 8.2 | Page 29

Write the name from the description.
The group with valency zero.

Q 8.3 | Page 29

Write the name from the description.
The family of nonmetals having valency one.

Q 8.4 | Page 29

Write the name from the description.
The family of metals having valency one.

Q 8.5 | Page 29

Write the name from the description.
The family of metals having valency two.

Q 8.6 | Page 29

Write the name from the description.
The metalloids in the second and third periods.

Q 8.7 | Page 29

Write the name from the description.
Nonmetals in the third period.

Q 8.8 | Page 29

Write the name from the description.
Two elements having valency 4.

## Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 - Periodic Classification of Element

Balbharati solutions for Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 (Periodic Classification of Element) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Science and Technology Part 1 10th Standard SSC Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Science and Technology Part 1 10th Standard SSC Maharashtra State Board chapter 2 Periodic Classification of Element are Position of Element in the Modern Periodic Table, Modern Periodic Table and Electronic Configuration of Elements, Groups and Electronic Configuration, Periods and Electronic Configuration, Trends in the Modern Periodic Table, Atomic Size, Metallic- Nonmetallic Character, Gradation in Halogen Family, The Modern Periodic Table, Classification of Elements, Dobereiner’s Triads, Newland's Law of Octaves, Mendeleev’s Periodic Table, Merits of Mendeleev’s Periodic Table, Demerits of Mendeleev’s Periodic Table, Modern Periodic Law.

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