Give the symbols for the following element: Helium

Helium is represented as He in the periodic table. Symbols are the abbreviations for the name of the elements and every element has a specific symbol.

Give the symbols for the following element: Sodium

Some elements have their symbols based on their Latin names. The Latin name for sodium is Natrium. Its symbol is Na .

Give the symbols for the following element: Chlorine

Symbols are the abbreviations for the name of the elements and every element has a specific symbol. Symbol for chlorine is Cl . it has the atomic number 17 .

E M B I B E

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 4 - Elements, Compounds and Mixtures>Exercise 15>Q 5

EASY

Lower Secondary Stage 8

IMPORTANT

Earn 100

You can use both evaporation and distillation to separate salt and water. Choose which method you would use to make salt from seawater. Give a reason for your choice.

Important Questions on Elements, Compounds and Mixtures

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 4 - Elements, Compounds and Mixtures>Exercise 15>Q 6

Explain the function of the cold water in the distillation equipment.

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 4 - Elements, Compounds and Mixtures>Exercise 15>Q 7

The boiling temperature of ethanol is $78 ° C$ . The boiling point of water is $100 ° C$ . Describe how the distillation equipment in the figure can be used to separate a mixture of ethanol and water. Explain how the method works.

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