Symbol equations

This lesson recaps the law of conservation of mass and will teach you how to balance symbol equations.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Revision - argon has an atomic number of 18 and a mass number of 40. How many neutrons does an atom of argon contain?

1/7

Q2.How many elements are there in HNO₃?

2/7

Q3.How many atoms are there in HNO₃?

3/7

Q4.Rubidium is in group 1 of the periodic table. What charge ion will it form?

4/7

Q5.Oxygen is in group 6 of the periodic table. What charge ion will it form?

5/7

Q6.A compound contains 1 magnesium atom and 2 chlorine atoms. What is the chemical formaulae of the compound.?

6/7

Q7.What is the relative formula mass of CH₄? (The relative mass of carbon is 12 and the relative mass of hydrogen is 1).

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Revision - argon has an atomic number of 18 and a mass number of 40. How many neutrons does an atom of argon contain?

1/7

Q2.How many elements are there in HNO₃?

2/7

Q3.How many atoms are there in HNO₃?

3/7

Q4.Rubidium is in group 1 of the periodic table. What charge ion will it form?

4/7

Q5.Oxygen is in group 6 of the periodic table. What charge ion will it form?

5/7

Q6.A compound contains 1 magnesium atom and 2 chlorine atoms. What is the chemical formaulae of the compound.?

6/7

Q7.What is the relative formula mass of CH₄? (The relative mass of carbon is 12 and the relative mass of hydrogen is 1).

7/7

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Symbol Equations

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which is correct about conservation of mass?

1/6

Q2.Ammonia can be made by reacting nitrogen and hydrogen together. How many grams of hydrogen will react with 6g of nitrogen to form 11g of ammonia?

2/6

Q3.Which of these equations is balanced correctly?

3/6

Q4.Which of these equations is balanced correctly?

4/6

Q5.Which of these equations is balanced correctly?

5/6

Q6.Revision - what is the relative formula mass of carbon dioxide (CO₂)? Carbon has a mass of 12 and oxygen has a mass of 16.

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Symbol Equations

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which is correct about conservation of mass?

1/6

Q2.Ammonia can be made by reacting nitrogen and hydrogen together. How many grams of hydrogen will react with 6g of nitrogen to form 11g of ammonia?

2/6

Q3.Which of these equations is balanced correctly?

3/6

Q4.Which of these equations is balanced correctly?

4/6

Q5.Which of these equations is balanced correctly?

5/6

Q6.Revision - what is the relative formula mass of carbon dioxide (CO₂)? Carbon has a mass of 12 and oxygen has a mass of 16.

6/6

Lesson summary: Symbol equations

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