Elements
What is an element?
A substance made of only one type of atom.
Who developed the first widely accepted Periodic Table?
Dmitri Mendeleev.
What type of reaction occurs when a fuel burns in oxygen?
Combustion
What is the main greenhouse gas released by burning fossil fuels?
Carbon dioxide.
What is a natural resource?
A useful material or substance found in nature.
Which element has the chemical symbol Na?
Sodium
What are the vertical columns in the Periodic Table called?
Groups
What type of reaction occurs when an acid reacts with a metal?
A displacement reaction
What is climate change?
Long-term changes in Earth's climate patterns.
Which metal is extracted from bauxite?
Aluminium
Name the most abundant gas in Earth's atmosphere.
Nitrogen
What are the horizontal rows in the Periodic Table called?
Periods
What is the name of a reaction where a compound breaks down into simpler substances?
Decompostion
Name one fossil fuel.
Coal, oil, or natural gas.
What does renewable mean?
A resource that can be replenished naturally.
Which metal is liquid at room temperature?
Mercury
Which group contains very reactive metals such as lithium and sodium?
Group 1 (Alkali Metals).
A student adds hydrochloric acid to sodium hydroxide. What type of reaction is taking place?
Neutralisation
How do greenhouse gases contribute to global warming?
They trap heat in the atmosphere.
Why is recycling aluminium beneficial?
It uses less energy than extracting aluminium from its ore.
What do all atoms of the same element have in common?
They have the same number of protons.
Why do elements in the same group have similar chemical properties?
They have the same number of electrons in their outer shell.
What is the name of a reaction in which energy is transferred to the surroundings?
Exothermic reaction.
Give two ways people can reduce carbon dioxide emissions.
Examples include using renewable energy, public transport, electric vehicles, energy-efficient appliances, insulation, and planting trees.
Explain the difference between renewable and non-renewable resources.
Renewable resources can be replaced naturally within a human timescale; non-renewable resources are finite and will eventually run out.