Something wrong

Something wrong

Pencil and paperOnline interactive
Overview
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Further Resources
This task is about properties of elements, compounds and mixtures.
diagram 1  diagram 2  diagram 3
A group of friends were talking about elements, compounds and mixtures. Each made a statement, but no one was completely correct. Explain the mistake in each statement.

Question 1Change answer

Statement 1: Lara said, "In compounds the number of protons doesn't equal the number of electrons."
Explanation:

Question 1Change answer

Statement 2: Tama said, "A compound is a chemical which contains more than one atom."
Explanation:

Question 1Change answer

Statement 3: Matthew said, "Elements have only one atom."
Explanation:

Question 1Change answer

Statement 4: Phoenix said, "In mixtures there are at least two particles joined together."
Explanation:
Task administration: 
This task can be completed with pencil and paper or online.
Level:
5
Curriculum info: 
Science, Investigating in science, Material World
Keywords: 
structure of matter, elements, compounds, mixtures, atoms, vocabulary
Description of task: 
Students explain the mistake in each of six sentences about elements, compounds or mixtures.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Interpret representations
This resource provides opportunities to identify how symbols are used to represent the structure of elements, mixtures and compounds.
Science capabilities: 
Interpret representations
Answers/responses: 
  

Y9 (11/1996)
a) Statement 1:
Compounds are neutral overall, i.e., number of protons = number of electrons.		 difficult
b) Statement 2:
Compounds have more than one type of atom.		 very difficult
c) Statement 3:
Elements have only one type of atom (they may contain 2 or more atoms of the same type, e.g., O2).		 very difficult
d) Statement 4:
In a mixture the particles are not joined – they move around each other.		 very difficult