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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

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

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

  • Click "Close Video"
  • Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

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.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

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.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

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

It looks like you have not completed one of the quizzes.

To share your results with your teacher please complete one of the quizzes.

Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga

Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.

Share your views and have your voice heard.

The next lesson in Reactivity is "Acids and metals"

Browse Oak's lessons: