Properties of elements

12 questions

1. In chemistry, what does it mean if a substance is described as 'pure'?
2. An element on the Periodic Table is made up of only one type of ...
3. Which statements explain why elements are considered to be pure substances?
4. A ___ is a characteristic of something that helps us describe or identify it.
5. An example of a ___ is the flavour of a lemon. It can be said to have a sour taste.
6. Which properties would be essential for making a saucepan?
7. Why do elements have fixed melting and boiling points?
8. Which of the following are physical properties of an element?
9. Which of the following is **not** a physical property of an element?
10. A physical change is ___ to reverse, e.g. melting or boiling. (Fill the blank with either difficult or easy)
11. True or false? In chemical reactions, new substances are always formed.
12. Every element has its own ___ combination of properties.

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