EASY
10th Mizoram Board
IMPORTANT
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Which element has two shells, both of which are completely filled with electrons?

Important Questions on Periodic Classification of Elements

EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 3

Which element has:
The electronic configuration 2, 8, 2?

EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 3

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

EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 3
Which element has:
A total of two shells, with three electrons in its valence shell?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 3
Which element has:
Twice as many electrons in its second shell as in its first shell?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 4
What property do all elements in the same column of the Periodic Table as boron have in common?
HARD
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 4
What property do all elements in the same column of the Periodic Table as fluorine have in common?
MEDIUM
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 5

An atom has an electronic configuration 2, 8, 7.
What is the atomic number of this element?

HARD
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 5 - Periodic Classification of Elements>EXERCISES>Q 5
An atom has an electronic configuration 2, 8, 7.
To which of the following elements would it be chemically similar?
(Atomic numbers are given in parentheses.)
N(7)    F(9)    P(15)    Ar(18)