…………is a pure substance that
cannot be decomposed (broken down) into simpler substances.
a) Element
b) compound
c) mixture
d) all of these
The letter used to identify an element in the periodic table is known as……..
a) formula
b) idea
c) symbol
d) hint
The person who first arranged elements in form of periodic table was
a) Lewis
b) Mendeleev
c) Thomas
d) Darwin
There are about ………..naturally occurring elements.
a) 87
b) 92
c) 95
d) 102
A substance which consists of two or more elements which have been combined chemically is called…….
a) element
b) compound
c) mixture
d) solute
A substance which consists of two or more elements which have been combined chemically is called…….
a) element
b) compound
c) mixture
d) solute
