Starter quiz
- What does each element on the periodic table represent?
- A type of molecule
- A compound
- A type of atom ✓
- A mixture
-
- According to Dalton's atomic theory, what is an atom?
- A tiny ball that can be split
- A ball that cannot be broken up ✓
- A type of molecule
- A type of compound
-
- What is a chemical bond?
- A reaction that splits elements
- A force that holds atoms together in a substance ✓
- A method to separate compounds
- The process of melting elements
-
- Which of the following are the correct symbols for the elements stated?
- Su - sulfur
- Na - sodium ✓
- f - fluorine
- O - oxygen ✓
- NI - nickel
-
- Which of the following is a pure substance?
- Air (includes oxygen, nitrogen, argon, carbon dioxide etc.)
- Molecules of water (made of hydrogen and oxygen atoms) ✓
- Molecules of oxygen (O₂) ✓
- Sea water (salty water)
- A sample of one metal (e.g. iron) ✓
-
- All matter is made up of...
- 'atoms' ✓
Exit quiz
- What defines a chemical compound?
- A single element in its pure form.
- Two or more different elements chemically bonded. ✓
- A mixture of elements without chemical bonding.
- A solid element only.
-
- In a chemical reaction, what happens when a chemical bond is formed?
- Elements lose their properties.
- A new substance is created with different properties. ✓
- The elements separate physically.
- It creates a mixture.
-
Which of the following words can be used to describe the following substance? Look at the diagram below.- Element
- Compound ✓
- Molecule ✓
- Mixture
-
- Which of the following is a chemical compound?
- O₂ (Oxygen gas)
- H₂O (Water) ✓
- N₂ (Nitrogen gas)
- He (Helium gas)
-
- Which statement is true about a chemical compound?
- It can be separated back into its elements by physical means.
- It has the same properties as its component elements.
- It is formed by a chemical reaction. ✓
- It consists of only one type of atom.
-
- Why do compounds have different properties than the elements they are made from?
- The elements forget about their properties.
- A compound is a completely different chemical to the elements that made it. ✓
- Compounds are always changing their properties
- Only metals form compounds.
-
Worksheet
Presentation
Video
Lesson Details
Key learning points
- A compound is made of two or more different elements chemically bonded through a chemical reaction.
- A compound may have different properties to each of the elements that it is made from.
Common misconception
Compounds will have the same properties as the elements from which they are made.
Compounds usually have completely different properties from the elements from which they are made.
Keywords
Chemical compound - A substance made by a chemical reaction where two or more different elements chemically bond together.
Chemical bond - A strong force that holds atoms together in a compound. A chemical bond takes lots of energy to overcome and break.
+