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WorksheetsPERIODIC CLASSIFICATION OF ELEMENTS
Total questions: 10
Worksheet time: 4mins
How many periods and groups are present in the periodic table?
7 periods and 18 groups
8 periods and 7 groups
18 periods and 7 groups
17 periods and 5 groups
Which of the following forms the basis of the modern periodic table?
Atomic mass
Atomic number
Number of nucleons
All of these
The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in
4th group
14th group
2nd group
18th group
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? yes or no? Name them.
Dobereiner could arrange just …………elements in triads.
(a)
Calcium is at ………….position in Newlands’ table.
(a)
Newlands Law of Octaves got wide acceptance among scientists.
true
false
Dobereiner arranged elements in increasing order of atomic mass.
True
False
Newlands’ Law of Octaves could be applied up to which of the following elements?
Iron
Chlorine
Sodium
Calcium
Newlands Law was similar to which of the following? (mind map)
Colours of rainbow
Notes of music
Planets in solar system
Days of week
