EASY
Earn 100

Arrange the following: a) F b) Cl c) Br d) I, in the increasing order of their atomic sizes. Note: F: Fluorine, Cl: Chlorine, Br: Bromine and I: Iodine

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Important Questions on Periodic classification of elements

EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Elements present in any group have the same number of
MEDIUM
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table

How many of the following statements are correct?

(a) 'He' is the second most abundant element in the universe.

(b) the symbol for the element with atomic number 110 is Ds.

(c) Osmium has the highest density among all elements.

(d) Francium is the most electropositive element in the periodic table.

EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
State modern periodic law.
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
As of now, total number of elements with atomic numbers placed in the periodic table is
MEDIUM
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table

Select the correct set of statements regarding change in properties, as we move from left ot right in the second period of periodic table.

(i) Atomic size decreases

(ii) Valency remains the same

(iii) Electronegativity increases

(iV) Metallic character decreases

EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Which of the following elements exhibit variable valency?
HARD
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Five elements A, B, C, D and E have atomic numbers of 2,3,7,10 and 18 respectively. The elements which belong to the same period of the periodic table are:
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Element M forms a chloride with the formula MCl3. Element M would most likely in the same group of periodic table as:
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
The elements which has the maximum number of valence electron is
MEDIUM
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
An element X forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely to be in the same group of the Periodic Table as 
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Match Column I (atomic number of elements) with Column II (position of elements in Periodic Table) and select the correct answer using the codes given below the Columns.
Column I Column II
A. 19 i. p-block
B. 22 ii. f-block
c. 32 iii. d-block
d. 64 iv. s-block
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Which set does not show the correct match of ion and electronic configuration?
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
The number of periods in the long form of periodic table is
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
The electron configuration of the starting and ending elements of fourth period are
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
The period number in the long form of the periodic table is equal to
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
As per the modern periodic law the physical and chemical properties of the elements are periodic function of their
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
MEDIUM
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Element with atomic number 47 belongs to
MEDIUM
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
Which of the following contains same number of elements
EASY
Chemistry>Chemistry - Xth Grade>Periodic classification of elements>The Modern Periodic Table
The maximum number of valence electrons possible for atoms in the second period of the periodic table is: