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WorksheetsCHEMISTRY HBEL 8
Total questions: 15
Worksheet time: 8mins
Which statement correctly describes an atom?
The smallest particle of a compound that has the properties of an element
The largest unit of matter that can exist
The smallest unit of matter that retains the properties of an element
A particle that contains no subatomic parts
If everything around you is made of matter, what does that suggest about atoms?
Only gases have atoms
Only solids have atoms
All matter is made up of atoms
Atoms are only found in living things
What makes atoms the "building blocks" of matter?
They can be seen under a microscope
They combine to form all kinds of substances
They exist only in solids
They are identical in all elements
Which of the following is negatively charged?
Proton
Neutron
Electron
Nucleus
The nucleus of an atom contains:
Protons and electrons
Electrons and neutrons
Protons and neutrons
Only neutrons
When sodium reacts with chlorine to form table salt, what type of change occurs?
Physical change
Chemical change
Mechanical change
No change
What force holds atoms together in compounds?
Magnetic attraction
Gravitational force
Chemical bonds
Frictional force
A molecule of water (H₂O) contains:
One hydrogen and two oxygen atoms
Two hydrogen and one oxygen atom
Two oxygen and two hydrogen atoms
One oxygen atom only
Which mixture can be separated by filtration?
Sugar solution
Sand and water
Salt water
Vinegar
The air we breathe is a mixture because:
It contains more than one gas not chemically combined
It is a single element
It forms one compound
It has no atoms
In the Periodic Table, elements are arranged by:
Alphabetical order
Atomic number
Weight of the nucleus only
Number of neutrons
Elements in the same column of the Periodic Table:
Are unrelated
Have similar chemical properties
Have the same number of atoms
Have identical masses
The horizontal rows in the Periodic Table are called:
Columns
Groups
Periods
Families
A shiny, ductile, and good conductor element is a:
Metalloid
Metal
Non-metal
Gas
Which property is most likely for non-metals?
Conduct electricity well
Shiny surface
Brittle and dull
High melting point
