2C.1 - Atoms, Molecules; Elements, Compounds & Mixtures Halfway Review

Instructions:

1. Fill in your exam number in the box above.
2. Answer all questions

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1) What are there more of, chemicals or elements?

2) What experiments did John Dalton carry out?

3) What are chemicals that can not be split into other chemicals called?

4) What is an element made of?

5) What determines the element?

6) What are chemicals called that are made of more than one element chemically bonded together?

7) What is a compound made up of?

8) What did Dalton find out when he split compounds?

9) How many elements are there and where can we find this list?

10) What is an atom?

11) What is a molecule?

12) What is an element?

13) What is a compound?

14) What is a mixture?

15) How do we represent chemicals universally?

16) What rules apply to all chemical symbols?

17) What does the chemical formulae of a compound show?

18) How can you tell a compound from the formula of it?

19) How can you tell an element from the formula of it?

20) How can we identify the number of elements in a compound?

21) Identify the number of element and atoms in the following formulae: CO Co NaOH MgO MgSO4 CaCO3 CaCl What are the elements in the above formulae?

22) How can you represent a mixture in writing?

23) How do the Big Ideas link to this topic?