Starter quiz
- What does a period in the periodic table represent?
- Elements with the same number of outer shell electrons.
- Elements with the same atomic number.
- Elements with the same number of electron shells. ✓
- Elements with similar chemical properties.
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- What do elements in the same group of the periodic table have in common?
- similar atomic number
- same number of electron shells
- same atomic mass
- similar chemical properties ✓
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- Which of the following is an example of a chemical change?
- melting ice
- tearing paper
- dissolving sugar in water
- burning wood ✓
- boiling water
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- In a chemical reaction, the substances that are present at the start are called ...
- 'reactants' ✓
- Which of the following is a property of gases?
- fixed shape and fixed volume
- fixed shape and variable volume
- variable shape and fixed volume
- variable shape and variable volume ✓
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- Elements in the same group of the periodic table have the same number of ______ in their outer shell.
- 'electrons' ✓
Exit quiz
- Noble gases are found in Group ______ of the periodic table.
- '0' ✓
- Which of the following elements is a noble gas?
- hydrogen
- oxygen
- helium ✓
- nitrogen
- chlorine
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- Why are noble gases unreactive?
- They are non-metals.
- They have complete outer electron shells. ✓
- They have low atomic masses.
- They are gases at room temperature.
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- The noble gas used in balloons because it is less dense than air is ...
- 'helium' ✓
- Arrange the following noble gases in order of increasing boiling points, starting with the lowest boiling point.
- 1⇔helium
- 2⇔neon
- 3⇔krypton
- 4⇔xenon
- Match the noble gas with its property or use:
- helium⇔lightest noble gas ✓
- neon⇔used in high-intensity lamps ✓
- argon⇔most abundant noble gas in the atmosphere ✓
- krypton⇔heaviest noble gas ✓
Worksheet
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Presentation
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Lesson Details
Key learning points
- Noble gases are in Group 0 of the periodic table and are unreactive.
- Noble gases are all gases at room temperature.
- They have complete outer electron shells, making them stable.
- Moving down Group 0 elements, atomic mass, density and boiling points increase.
Common misconception
Confusing the spelling of "noble" with "Nobel" and misunderstanding why noble gases are named so.
Clarify that "noble" refers to their stability and lack of reactivity due to a full outer electron shell, meaning they don't need to bond with other elements.
Keywords
Inert - An inert substance is one which is not chemically reactive.
Noble gas - A noble gas is an element in Group 0 of the periodic table.
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