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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

The d-block elements are called as _______ elements. - Science and Technology 1

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प्रश्न

The d-block elements are called as _______ elements.

पर्याय

  • transition

  • metalloid

  • normal

  • inner transition

MCQ
रिकाम्या जागा भरा

उत्तर

The d-block elements are called as transition elements.

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पाठ 2: Periodic Classication of Element - Choose the correct option.

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एससीईआरटी महाराष्ट्र Science and Technology 1 [English] 10 Standard SSC
पाठ 2 Periodic Classication of Element
Choose the correct option. | Q 16

संबंधित प्रश्‍न

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?


In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?


On which side of the periodic table will you find metals?


On which side of the periodic table will you find non-metals?


The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:

(a) P
(b) Q
(c) R
(d) S


What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?


State how the valency of elements varies in a period of the periodic table?


Explain why, the first period of the periodic table has only two elements whereas second period has eight elements


What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?


What are the merits of the modern periodic table of elements?


 In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?


The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):

a
3
b
4
  c
5
d
6
e
7
f
8
g
9
h
10
i
11
j
12
  k
13
l
14
m
15
n
16

o
17
p
18

(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.


Define:- Periodic table


Correct the statement.

Copper and zinc are representative elements.


Correct the statement.

Transition elements are placed at extreme right of the periodic table.


Name two elements in each case: 

Actinides


Name the type of elements which have two outermost shell incomplete.


An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.

Is it larger or smaller than caesium (Cs)?


The electronic configuration of an element T is 2, 8, 8, 1.

What is the group number of T?


State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?

 

 

How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?


Give the symbol and valency of the following element and radical.

Calcium


Give the symbol and valency of the following element and radical.

Nitrogen [Nitride]


Give the chemical formula of ammonium sulphate


The groups 1 and 2 constitute the _______ block.


Mendeleev's periodic table : atomic mass : : Modern periodic table : _______


Write scientific reason.

Lithium and sodium are included in the same group in periodic table.


Complete the following flow chart.


Distinguish between:

s-block - p-block


Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.

Periods Group 2 Group 17
2 ----- A
3 B -----
4 ----- C
  1. What is A element metal or nonmetal?
  2. Which is the outermost orbit of element B?
  3. Identify C element and it's physical state.

State any five features of modern periodic table.


The scientist who propounded the modern periodic law is ______.


The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.


Compare the radii of two species X and Y. Give reasons for your answer.

  1. X has 12 protons and 12 electrons
  2. Y has 12 protons and 10 electrons

Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.

It has same valency as Lithium.


Spot the error:

There are 5 periods and 17 groups in the modern periodic table.


Name the non-metals in the first twenty elements.


Match the atomic number with the following:

An element of group 2.


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