Science Worksheet Answers (W5A)

Hi All, to those that have not caught the answers for W5A, here are the answers below.

1. B (Carbon is NOT a metal as it is not shiny and ductile)

2. C

3. C

4. B

5. A

6. B

7. D

8. C

Structured Questions

2a. No. It can be broken down into simpler substances which is mercury and oxygen by chemical means (heating) but an element cannot.

2b. Oxygen. It will re-light a glowing sprint as it supports combustion.

2c. 2HgO (S) + heat ----> 2Hg (L) + O2 (G)

3a. Li, K, Zn

3b. Shiny when polished and Ductile.

3c. Carbon, Sulfur, Argon, Iodine

3d. i) *Unsure

3d. ii) They have a gradual change of chemical and metallic to non-metallic properties.

3e. Same Group: Li, K (Group I)

      Same Period: Li, C (Period II) K, Zn (Period 4) S, Ar (Period 3)

4. Solids: Carbon, Iodine, Magnesium, Sulfur

    Liquids: Bromine, Mercury

    Neon, Florine, Argon, Hydrogen

5a. Copper Metal

Chemical Formula: Cu

5b. Chlorine Gas

Chemical formula: Cl2