Periodic Properties L1
Introduction to Periodicity and Periodic Table
Questions
1. Which of the following is not a part of Dobereiner’s Law of
Triads ?
A. Na, Li, k
B. Ba, Ca, Sr
C. Br, Cl, I
D. N, O, F
2. Which of the following is incorrect about Newlands’ Law of
Octaves ?
A. Arrangement of the elements in increasing order of their
atomic masses
B. Properties of every sixth element are similar to the first
element
C. It was applicable to only lighter elements having atomic masses
up to 40u, i.e., up to calcium.
D. this method of classifying elements did not leave any room for
the discovery of new elements.
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3. How many periods and group in modern periodic table?
A. Groups: 16; Periods: 7
B. Groups: 17; Periods: 8
C. Groups: 18; Periods: 7
D. Groups: 17; Periods: 6
4. Pick the correct statements regarding modern periodic table:
A. While moving across a period, elements have same valence
shell.
B. Position of hydrogen is not justified in modern periodic
table.
C. Physical and chemical properties of elements are a periodic
function of their atomic masses.
D. Elements arranged in order of increasing atomic number.
5. Moseley plots graph between _____.
A. √𝜈 vs Z
B. √𝜆 vs M
C. √𝜈 vs M
D. √𝜆 vs Z
𝜐 - frequency
𝜆 - wavelength
Z - atomic no
M - atomic mass
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Answer Key
1
D
2
B
© 2022, BYJU'S. All rights reserved
3
C
4
ABD
5
A
3