Elements, Compounds & Mixtures



Part 1: Chemical Symbols Name:____________________________

|Chemical Name |Chemical Symbol | |

| | | |

| | | |

| | |Task: Fill in the missing element |

| | |names and chemical symbols |

|Zinc | | |

| |Cu | |

|Sulfur | | |

|Aluminum | | |

| |Mg | |

| |C | |

|Neon | | |

Part 2: Circle the metals found below.

| |

|Lithium Iron Silver Tungsten |

|Nitrogen Copper Zinc Potassium |

|Oxygen Francium Palladium Polonium |

Part 3: Elements, Compounds & Mixtures

1. Decide whether each of the following is an element or a compound. (10)

O2 CO2 H2 HF Fe H2S C60 C6H12O6 CO Co

2. Look at the diagrams below and decide whether each one represents the particles in an element, a compound or a mixture. Different color atoms represent atoms of different elements. (6)

|i. |ii. |iii. |iv. |v. |vi. |

3. Describe the pictures below. Are they compounds, elements or mixtures? Are they atoms or molecules?

4. It’s matching time!!

1. Which of the above pictures (A-H) represents atom of an element?

………………………………………………………………………………………………………………………….

2. Which of the above pictures represents molecules of an element?

………………………………………………………………………………………………………………………….

3. Which picture displays a mixture of atoms?

………………………………………………………………………………………………………………………….

4. Which picture displays a mixture of atoms and compounds?

………………………………………………………………………………………………………………………….

5. Which picture displays molecules of a compound?

………………………………………………………………………………………………………………………….

6. EXTENSION: which picture shows atoms of an element which is a solid?

………………………………………………………………………………………………………………………….

Part 4: Writing the chemical formula

1. Write the formula for each of the following molecules in the diagrams. Specify whether they are elements or compounds. (10)

2. Draw the molecules represented by the following formulae. (5)

HCl Fe H2S NO2 NaCl

Extension:

3. Write the formula for each of the following molecules in the diagrams.

4. Draw the molecules represented by the following formulae. (6)

C2H6 H2SO4 Zn(NO3)2

-----------------------

O

C

O

HO

H

H

Ar

N

N

O

O

H

C

H

H

O

C

O

S

O

O

O

O

H

H

(6)

H

H

C

C

C

C

C

C

H

H

H

H

H

H

C

H

H

H

H

C

O

O

N

N

Cu

O

O

O

O

O

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