WorksheetsGrade 7 Chemistry Chapter 3.2
Total questions: 20
Worksheet time: 11mins
The substance which contains particles of only one kind
Pure substance
Impure substance
Mixtures
All the elements and compounds are (a) substances because they contain only one kind of particles
________ cannot be split up into two or more simpler substances by any physical or usual chemical processes
Elements
Compounds
Mixtures
A _______ substance has a fixed composition as well as fixed melting point and boiling point
Pure substance
Impure Substance
The smallest part of an element that retains the properties of the element is the
nucleus.
electron
atom
neutron
Which is the best example of a pure substance?
pizza
gold
saltwater
air
Which substance is a compound?
copper
magnesium
saltwater
water
What kind of substance is composed of two or more elements that are chemically combined?
element
mixture
solution
compound
What is the definition of an element?
A pure substance that cannot be broken down into any simpler substances by chemical methods.
A substance made up of two or more elements chemically joined together.
Two or more substances which are not joined together chemically.
A substance that dissolves in a solvent.
The Symbol for the Element Oxygen
C
O
Os
Cl
The Symbol for the Element Hydrogen
H
He
Hf
Ho
The Symbol for the Element Calcium
C
Ca
Co
CA
The Symbol for the Element Sodium
NA
N
Na
So
The Symbol for the Element Phosphorus
Ph
P
F
PH
A sample of matter that is made of many identical particles can best described as
an element
a mixture
a compound
an atom
Different elements are made up of
identical types of atoms
different types of atoms
1 element is made of
identical types of atoms
different types of atoms
Compounds are different than elements because compounds are ---
combinations of two or more elements.
not able to be broken down into parts.
made from the same type of atoms.
a pure substance; elements are not.
NaCl is an example of a compound that contains helium and oxygen atoms.
Agree
Disagree
