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▶ 2: Periodic Classification of Element
3: Chemical reactions and equations
4: Effects of electric current
5: Heat
6: Refraction of light
7: Lenses
8: Metallurgy
9: Carbon Compounds
10: Space Missions
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Solutions for Chapter 2: Periodic Classification of Element
Below listed, you can find solutions for Chapter 2 of Maharashtra State Board Balbharati for Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board.
Balbharati solutions for Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board 2 Periodic Classification of Element Exercises [Pages 28 - 29]
Rearrange the columns 2 and 3 so as to match with the column 1.
| Column 1 | Column 2 | Column 3 |
| i. Triad ii. Octave iii. Atomic number iv. Period v. Nucleus vi. Electron |
a. Lightest and negatively charged particle in all the atoms b. Concentrated mass and positive charge c. Average of the first and the third atomic mass d. Properties of the eighth element similar to the first e. Positive charge on the nucleus f. Sequential change in molecular formulae |
1.Mendeleev
2. Thomson
3. Newlands
4. Rutherford
5. Dobereiner
. Moseley
|
Choose the correct option and rewrite the statement.
The number of electrons in the outermost shell of alkali metals is _______.
1
2
3
7
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
Group 2
Group 16
Period 2
d-block
The molecular formula of the chloride of 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
In which block of the modern periodic table are the nonmetals found?
s-block
p-block
d-block
f-block
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.
What is the group of this element?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
To which period does this element belong?
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)
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3?
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?
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?
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.
11Na, 15P, 17Cl, 14Si, 12Mg Which of these has largest atoms?
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?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.
13Al, 14Si, 11Na, 12Mg, 16S
Which of the above elements has the highest metallic character?
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?
Write the name and symbol of the element from the description.
The atom having the smallest size.
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Write the name and symbol of the element from the description.
The most electronegative atom.
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Write the name and symbol of the element from the description.
The most reactive nonmetal.
Write a short note.
Mendeleev’s periodic law.
Write a short note.
Structure of the modern periodic table.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Write scientific reason.
Atomic radius goes on increasing down a group.
Write scientific reason.
Elements belonging to the same group have the same valency.
Write scientific reason.
The third period contains only eight elements even though the electron capacity of the third shell is 18
Write the name from the description.
The period with electrons in the shells K, L, and M.
Write the name from the description.
The group with valency zero.
Write the name from the description.
The family of nonmetals having valency one.
Write the name from the description.
The family of metals having valency one.
Write the name from the description.
The family of metals having valency two.
Write the name from the description.
The metalloids in the second and third periods.
Write the name from the description.
Nonmetals in the third period.
Write the name from the description.
Two elements having valency 4.
Solutions for 2: Periodic Classification of Element
Balbharati solutions for Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board chapter 2 - Periodic Classification of Element
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Concepts covered in Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board chapter 2 Periodic Classification of Element are Structure of the Modern Periodic Table, Modern Periodic Table and Electronic Configuration of Elements, Periodic Properties, Dobereiner’s Triads, Newland's Law of Octaves, History of Periodic Table: Early Attempts at the Classification of Elements, Mendeleev’s Periodic Table, Merits and Demerits of Mendeleev’s Periodic Table, Modern Periodic Law, The Modern Periodic Table, Valency, Groups and Electronic Configuration, Atomic Radius Or Atomic Size, Metallic and Non-metallic Characters, Group VIIA Or Group 17 (The Halogens), Periods and Electronic Configuration.
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