MEDIUM
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What are the types of elements?

Important Questions on Atoms, Elements and Compounds

EASY
_____ is a pure substance in which the atomic number of each atom is the same.(element/compound)
EASY
Horizontal lines of the periodic table are called _____.
EASY
An element is made of only one kind of _____.
EASY

Vertical lines in periodic table are called _____.

MEDIUM
A substance made of only one kind of atom is called an _____.
EASY
Inner transition elements placed in sixth period are called _____.
EASY
Name the most abundant element in the universe is _____.
EASY

Moseley classified elements according to their _____. (atomic number/atomic mass)

EASY

 _____(Mendeleev/Moseley) law states that the properties of elements are periodic function of their atomic masses.

EASY
The elements of group 17 are called _____.
EASY
According to modern periodic law, the properties of the elements are in periodic function of their _____. (Atomic number/ Atomic mass)
EASY
The highly non-metallic elements are present on _____ side of the periodic table.
EASY
_____ cannot be broken into simpler forms by chemical or physical methods. (Elements/ Compounds)
MEDIUM
There are _____ vertical lines in the periodic table.
HARD
An element is a group of _____ atoms. (similar/ dissimilar)
EASY
The substances made up of only one type of atoms are called _____.
EASY
The number of elements which occur in nature is _____.(94/108)
MEDIUM
The idea of telluric helix for arrangement of elements was given by _____. (Newlands / Chancourtois)