Atoms can be broken down into smaller particles by chemical means.
An element is made up of only one type of atom.
The periodic table organizes elements by their reactivity.
Non-metals are usually found on the left-hand side of the periodic table.
Which of these elements is a liquid at room temperature?
Oxygen
Iron
Mercury
Carbon
Which of the following is a compound?
A mixture of iron filings and sulfur powder.
Pure gold.
Water (H2O).
Nitrogen gas (N2).
What is the name of the compound formed when sodium (Na) and chlorine (Cl) chemically combine?
Sodium dichloride
Monosodium chloride
Sodium chloride
Sodium monochloride
What does the prefix "di-" mean in the name of a compound molecule containing oxygen?
One oxygen atom
Two oxygen atoms
Three oxygen atoms
No oxygen atoms
Imagine a beaker containing only oxygen molecules (O2). What type of substance is in the beaker?
A compound
A mixture of elements
An element
A mixture of compounds
Which of the following is the fundamental building block of all matter?
Molecules
Elements
Atoms
Compounds
By chemical means, atoms are considered to be the:
Largest part of a molecule.
Smallest part of a compound.
Smallest indivisible unit of an element.
Building blocks of protons and neutrons.
Which of the following best describes a substance made up of only one type of atom?
A compound
A mixture
An element
A molecule
How are elements primarily organized on the modern periodic table?
Alphabetical order
By their state at room temperature
By groups (columns) and periods (rows) (number of protons)
By whether they are metals or non-metals
What do the vertical columns on the periodic table represent?
Periods
Rows
Groups
Elements in alphabetical order
Where are the non-metal elements located on the periodic table?
The top right corner
The bottom row
The right hand side (above the staircase)
In general, where are the metallic elements located on the periodic table?
The far left
The central block
The left (below the staircase)
Along the bottom two rows
What is the symbol for the element with atomic number 8?
N
He
O
F
Which of the following is the name of the element with the symbol 'Ca'?
Carbon
Chlorine
Calcium
Copper
Which of these elements is a gas at room temperature?
Bromine
Iodine
Nitrogen
Magnesium
which element is a liquid at room temperature?
Sulfur
Potassium
mercury
Silicon
What is the chemical symbol for lead?
pb
Pb
pB
PB
The "staircase" line on the periodic table primarily separates:
Metals from noble gases.
Alkali metals from halogens.
Metals from non-metals.
Solids from liquids.
Which of the following is a typical property of metals?
They are brittle and easily break.
They are poor conductors of electricity.
They are shiny and can be hammered into shape.
They are often gases at room temperature.
Which of the following is a typical property of non-metals?
They are usually good conductors of heat.
They often have a dull appearance.
They are easily stretched into wires.
They are always solids at room temperature.
An element is shiny, conducts electricity well, and can be bent easily. This element is most likely a:
Non-metal
Metalloid
Metal
Compound
What is formed when two or more different elements are chemically joined together?
A mixture
An alloy
A compound
A solution
When iron filings and sulfur powder are heated strongly together, they:
Form a mixture that can be easily separated with a magnet.
Undergo a physical change and retain their individual properties.
Chemically react to form a new compound with different properties.
Simply melt and mix together.
Why can a mixture of sand and water be separated by filtration, but the hydrogen and oxygen in water cannot?
Because sand and water are both solids.
Because hydrogen and oxygen are gases.
Because sand and water are physically mixed, while hydrogen and oxygen are chemically bonded in water.
Because filtration only works for elements, not compounds.
What is the name of the compound formed between magnesium (Mg) and bromine (Br)?
Magnesium dibromide
Monomagnesium monobromide
Magnesium bromide
Bromine magnesium
What is the name of the compound with the formula Na2SO4?
Sodium sulfate
sodium sulfide
Following the rules for naming simple compounds, what would be the likely name for the compound K2O?
Potassium dioxide
Dipotassium monoxide
Potassium oxide
Potassium oxygen
Which of the following substances exists as molecules?
Sodium chloride (NaCl)
Iron (Fe)
Carbon dioxide (CO2)
Copper (Cu)
Which of the following elements exists as a molecule containing two atoms joined together (diatomic)?
Helium
Neon
Chlorine
Argon
What is the name of the compound with the formula NO?
Nitrogen dioxide
Nitrogen trioxide
Nitrogen monoxide
Mononitrogen monoxide
What is the name of the compound with the formula PCl3?
Phosphorus chloride
Phosphorous chlorate
Phosphorus trichloride
A diagram shows several separate circles of the same colour. This diagram most likely represents:
A compound
A mixture of elements
An element
A mixture of compounds
A diagram shows two different coloured circles joined together. This represents:
A mixture of two elements
A single element
A compound
A mixture of two compounds
A diagram shows a collection of separate red circles and separate blue circles. This represents:
A compound
An element
A mixture of two elements
A mixture of two compounds
If you were to draw a molecule of carbon dioxide (CO2), how many oxygen atoms would be bonded to each carbon atom?
One
Two
Three
Four
Which of the following gases is present in the smallest percentage in the Earth's atmosphere today?
Nitrogen
Oxygen
Argon
Carbon dioxide
Compared to pure water, a mixture of salt and water will generally have a:
Higher boiling point and a lower melting point.
Lower boiling point and a higher melting point.
Higher boiling point and a higher melting point.
Lower boiling point and a lower melting point.
If adding a solute to a solvent causes the boiling point to increase according to a given equation, what would happen to the boiling point if you added more of the same solute?
It would decrease.
It would stay the same.
It would increase further.
The effect would be unpredictable.
What is shown in each of these diagrams?
element
compound
mixture (colloid)
In Year 7 Physics you learnt about protons, neutrons and electrons
Which of these are used to put the elements in their order on the periodic table?
protons
neutrons
electrons
By what percentage would we expect the volume to decrease?
5
10
15
20
25
If we started with 100 cm3 of air what volume of nitrogen would we end up with?
80
100
If we started with 100 cm3 of air what percentage of nitrogen would we end up with?