Assignment Details

Periodic Classification of Elements

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297 minutes

Jan 25, 2:03 PM

40.0 marks

MCQ

20 questions

Lavkumar

I am like teaching.

Class Details

Maths

10th

Maths

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Question Text

Question 1 :
An element A have 3 electrons in its outermost shell. Find its valency.

Question 2 :
An element B have 4 electrons in its outermost shell. Find its valency.

Question 3 :
Mendeleev predicted the existence of certain elements not known at that time and named it as Eka-silicon. What is the period of this element in the modern periodic table?

Question 4 :
Arrange the following elements in the order of their increasing nonmetallic character Li, O, C, Be, F

Question 5 :
In Mendeleev's Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the perioidc table later

Question 6 :
Arrange the following metals in increasing order of their reactivity. Na, K, Ca, Hg

Question 7 :
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Question 8 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d79273b230584979c0e.png' /> In the above table, the position of three elements A, B and C in the periodic table is shown, will C be larger or smaller in size than B?

Question 9 :
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

Question 10 :
Arrange the following elements in the increasing order of their metallic character: Mg, Ca, K, Ge, Ga

Question 11 :
Determine the valency of the element whose atomic number is 10.

Question 12 :
Identify the period number of the element whose atomic number is 7.

Question 13 :
Identify and name the element whose electronic configuration is 2, 1

Question 14 :
Where would you locate an element which is an inert gas with atomic number 2, in the periodic table?

Question 15 :
Identify the period number of the element whose atomic number is 20.

Question 16 :
An element A have 3 electrons in its outermost shell. Give the group number to which it belong in Modern Periodic Table.

Question 17 :
Which element has a total of three shells, with four electrons in its valence shell?

Question 18 :
Where would you locate an element with variable (more than one) valency stored under water, in the periodic table?

Question 19 :
Identify and name the element whose electronic configuration is 2, 8, 2

Question 20 :
Which of the following statements about the Modern Periodic Table is correct:

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