eurekami

Elements, compounds and mixtures

6th grade (Year 7 in England) · 16 questions · Common Core: NGSS.MS-PS1-1 · England: KS3 Chemistry: Atoms, elements and compounds, KS3 Chemistry: Pure and impure substances

Name

Date

Score/ 16

1
Question 1
Iron and sulfur are heated together and form iron sulfide. Why is iron sulfide a compound, not a mixture?
- A. It contains iron
- B. The elements are chemically joined, and a magnet no longer separates the iron
- C. It is a powder
- D. It can be separated with a magnet
2
Question 2
Is oxygen gas (O₂) an element, a compound or a mixture?
- A. element
- B. compound
- C. mixture
3
Question 3
Elements and compounds: which statement is NOT true?
- A. A compound contains two or more elements chemically joined.
- B. Air is a mixture.
- C. Mixtures can be separated by physical methods such as filtering.
- D. A compound has the same properties as its elements.
4
Question 4
How many elements are there in water, H₂O?
- A. 2
- B. 4
- C. 1
- D. 3
5
Question 5
Is salt and sand an element, a compound or a mixture?
- A. element
- B. compound
- C. mixture
6
Question 6
Elements and compounds: which statement is NOT true?
- A. A compound contains two or more elements chemically joined.
- B. There are over 100 known elements.
- C. A compound has the same properties as its elements.
- D. Mixtures can be separated by physical methods such as filtering.
7
Question 7
Sodium is a reactive metal and chlorine is a poisonous gas. What is sodium chloride like?
- A. exactly like sodium
- B. table salt, which is safe to eat in small amounts
- C. a poisonous gas
- D. a shiny metal
8
Question 8
Is helium an element, a compound or a mixture?
- A. element
- B. compound
- C. mixture
9
Question 9
Elements and compounds: which statement is NOT true?
- A. There are over 100 known elements.
- B. A compound has the same properties as its elements.
- C. Air is a mixture.
- D. Mixtures can be separated by physical methods such as filtering.
10
Question 10
Sodium is a reactive metal and chlorine is a poisonous gas. What is sodium chloride like?
- A. a shiny metal
- B. table salt, which is safe to eat in small amounts
- C. exactly like sodium
- D. a poisonous gas
11
Question 11
Is oxygen gas (O₂) an element, a compound or a mixture?
- A. element
- B. compound
- C. mixture
12
Question 12
Elements and compounds: which statement is NOT true?
- A. Mixtures can be separated by physical methods such as filtering.
- B. Air is a mixture.
- C. Water is an element.
- D. There are over 100 known elements.
13
Question 13
Iron and sulfur are heated together and form iron sulfide. Why is iron sulfide a compound, not a mixture?
- A. It is a powder
- B. The elements are chemically joined, and a magnet no longer separates the iron
- C. It can be separated with a magnet
- D. It contains iron
14
Question 14
Is orange juice an element, a compound or a mixture?
- A. element
- B. compound
- C. mixture
15
Question 15
Elements and compounds: which statement is NOT true?
- A. Mixtures can be separated by physical methods such as filtering.
- B. There are over 100 known elements.
- C. A compound can be separated by filtering.
- D. Air is a mixture.
16
Question 16
What is the smallest particle of an element that still has its properties?
- A. an atom
- B. a cell
- C. a crystal
- D. a mixture

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: Elements, compounds and mixtures

1. B. The elements are chemically joined, and a magnet no longer separates the iron
2. A. element
3. D. A compound has the same properties as its elements.
4. A. 2
5. C. mixture
6. C. A compound has the same properties as its elements.
7. B. table salt, which is safe to eat in small amounts
8. A. element
9. B. A compound has the same properties as its elements.
10. B. table salt, which is safe to eat in small amounts
11. A. element
12. C. Water is an element.
13. B. The elements are chemically joined, and a magnet no longer separates the iron
14. C. mixture
15. C. A compound can be separated by filtering.
16. A. an atom