Crack the code. Write down the element symbols to find the hidden words. Element Symbol Chlorine _____ Oxygen _____ Carbon _____ Potassium _____

Crack the code. Write down the element symbols to find the hidden words. Element Symbol Chlorine Cl Oxygen O Carbon C Potassium K Code: Cl O C K A chemical symbol is a notation of one or two letters representing a chemical element.Symbols are used commonly for the representation of elements in the modern periodic table since the names of elements can be long and complex to use. Chemical formulae and equations are also depicted using the chemical symbols of the constituent elements. Elements are pure substances which are the basic unit of matter and cannot be broken down into two or simpler substances by any means.

Crack the code. Write down the element symbols to find the hidden words. Element Symbol Carbon _____ Hydrogen _____ Iodine _____ Sodium _____

Crack the code. Write down the element symbols to find the hidden words. Element Symbol Carbon C Hydrogen H Iodine I Sodium Na Code: C H I Na A chemical symbol is a notation of one or two letters representing a chemical element.Symbols are used commonly for the representation of elements in the modern periodic table since the names of elements can be long and complex to use. Chemical formulae and equations are also depicted using the chemical symbols of the constituent elements. Elements are pure substances which are the basic unit of matter and cannot be broken down into two or simpler substances by any means.

Use the clues provided to complete the crossword puzzle. Across Down 2.The element's chemical symbol is Ar 1.This element is commonly found as shoot. 4.The element's chemical symbol is Mg . 3.You can find all the elements listed here. 5.About 21% of Earth's atmosphere. 8.The simplest particle in the particle theory. 6.About 78% of Earth's atmosphere. 11.This element is used to make bridges. 7.Often used to make rings and jewellery. 9.This gas helps clean swimming pools. 10.The element's chemical symbol is Be . 12.This gas can be used to fill party balloons.

Any substance that cannot be decomposed into simpler substances by ordinary chemical processes is called an element. Example: Hydrogen, Oxygen, Carbon etc. Each element is made of the same atoms. The properties of elements include colour, density, melting point, boiling point, and thermal and electrical conductivity.

EASY

Lower Secondary Stage 8

IMPORTANT

Earn 100

Draw a line to match the chemical symbol to its name

Important Questions on Elements, Compounds and Mixtures

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 4 - Elements, Compounds and Mixtures>Exercise 3>Q 3

Crack the code.

Write down the element symbols to find the hidden words.

Element	Symbol
Chlorine	_____
Oxygen	_____
Carbon	_____
Potassium	_____

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 4 - Elements, Compounds and Mixtures>Exercise 3>Q 3

Crack the code.

Write down the element symbols to find the hidden words.

Element	Symbol
Carbon	_____
Hydrogen	_____
Iodine	_____
Sodium	_____

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 4 - Elements, Compounds and Mixtures>Exercise 3>Q 5

Look at diagram A, B and C.
Question Image
State which diagram represents elements.
Give a reason for your answer.
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MEDIUM

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 4 - Elements, Compounds and Mixtures>Exercise 3>Q 6

Explain why chemists choose chemical symbols.
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HARD

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 4 - Elements, Compounds and Mixtures>Exercise 3>Q 7

Use the clues provided to complete the crossword puzzle.
Question Image

Across	Down
2.The element's chemical symbol is $Ar$	1.This element is commonly found as shoot.
4.The element's chemical symbol is $Mg$ .	3.You can find all the elements listed here.
5.About 21% of Earth's atmosphere.	8.The simplest particle in the particle theory.
6.About 78% of Earth's atmosphere.	11.This element is used to make bridges.
7.Often used to make rings and jewellery.
9.This gas helps clean swimming pools.
10.The element's chemical symbol is $Be$ .
12.This gas can be used to fill party balloons.