Worksheets5.3 Elements
Total questions: 20
Worksheet time: 12mins
According to Dalton’s theory, elements:
are always solids
contain only one kind of atom
can be split up into simpler substances
contain at least two different kinds of atom
An atom is:
the smallest particle that can exist.
a group of particles that are all the same.
the smallest particle of a compound that exists under normal conditions.
the smallest particle of an element that exists under normal conditions.
A molecule is:
the smallest particle that can exist.
the smallest particle of an element that can exist.
two or more atoms chemically joined together.
the same as an atom.
The number of types of atom in a compound is:
only one.
one or two.
two or more.
three or more.
How many different elements are there in the compound with the formula NH3?
one
two
three
four
A compound contains:
only one type of atom.
only one element.
only two elements joined together.
at least two elements joined together.
The correct way to write the chemical symbol for the element calcium is:
ca
CA
Ca
cA
Which list contains only non-metal elements?
oxygen, nitrogen, argon, silicon
chlorine, oxygen, sulfur, iron
bromine, helium, carbon, air
gold, silver, platinum, mercury
Which of the following lists contains only elements?
air, iron, iodine, magnesium
zinc, gold, aluminium, oxygen
nitrogen, copper, mercury, water
chlorine, argon, sodium, limestone
When iron and sulfur react they form:
a new element.
a mixture of elements.
a new compound.
a mixture of compounds.
