Page 1 - 4. Home Assignment Ch-5 MODERN PERIODIC TABLE

SAI International School
Class-X

Subject - Chemistry
Topic- Periodic Classification
Sub topic- Modern Periodic Classification

(Intro. & Description)

Home Assignment
Objective-
Q.1 How many periods are there in the long form of Periodic Table-
(a) 6 (b)7
(c) 8 (d)9

Q.2 The elements with atomic numbers 3, 11, 19, 37 and 55 belong to

(a) alkali metals (b) alkaline earth metals
(c) halogens (d) noble gases

Q.3 In the modern periodic table one of the following does not have a place in
the main Table.-
(a) transition elements (b) inert gases
(c) inner transition elements (d) halogens

➢ For Assertion& Reason question follow the following directions.
DIRECTION: Each of these questions contains an Assertion followed by Reason.
Read them carefully and answer the question on the basis of following options. You
have to select the one that best describes the two statements.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of
Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct
explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.

(d) If Assertion is incorrect but Reason is correct.
(e) If Assertion & Reason both are incorrect.

Q.4
Assertion: Sixth and seventh periods in the periodic table contains 14
elements.
Reason: In the periodic table, 14 elements of sixth and seventh periods
are known as lanthanoids and actinoids.

Q.5
Assertion: Silicon is a metalloid.
Reason: Silicon shows only properties of non-metals.

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