Atoms and elements
Lesson 8 / 9
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Lesson outcome
Waxaan sharxi karaa waxa curiye kiimiko (chemical element) yahay iyo tusaalooyin ka mid ah.
Introduction
In this lesson: I can describe what a chemical element is and give some examples. All matter is made up of atoms. Dalton’s model of an atom is of a sphere that cannot be broken up.
Show transcript
All matter is made up of atoms.
Dalton’s model of an atom is of a sphere that cannot be broken up.
An element is made up of only one type of atom.
Each element is made of a different type of atom.
Worksheet
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Quizzes
1. What happens to the overall mass when substances are mixed together?
- The mass cannot be measured.
- The mass decreases.
- The mass increases.
- Correct answer:The mass stays the same.
2. Which of the following is a feature of a pure substance?
- It contains different types of particles.
- It has a variable melting point.
- Correct answer:It is made of one type of particle.
- It cannot be measured in grams.
3. Which of the following diagrams represents more than one substance?
- a and b
- b only
- a, c and d
- Correct answer:b and d
1. What is the basic building block of all matter?
- Elements
- Correct answer:Atoms
- Compounds
- Molecules
2. According to Dalton's model of an atom, how are atoms represented?
- As a cube.
- Correct answer:As a sphere.
- As a flat disc.
- As a pyramid.
3. Which of the following statements are correct?
- C is short for the element name carbon.
- C always stands for the substance carbon.
- C means 1 atom of carbon.
- Correct answer:C is the symbol for the element carbon.
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 3 questions
- Lesson videoLearn
- Exit quizCheck · 3 questions
This content is by Cashar and published under an open licence.