10 Questions
What are pure substances made up of?
A relatively few basic substances
What is formed when elements are combined together?
A compound
What are the basic substances that make up pure substances?
Elements
What is the characteristic of pure substances in terms of their composition?
Constant composition
What can elements form when they are combined together?
Either elements or compounds
What part of the atom contains nearly all the weight?
Nucleus
Why can electrons be easily removed from their orbit?
Because they have a small mass
What is the relation between the mass of neutrons and protons?
Neutrons have the same mass as protons
Where are electrons typically found in an atom?
In orbit around the nucleus
What is the main difference between the mass of electrons and protons/neutrons?
Electrons are lighter
Learn about the building blocks of matter, elements and compounds. Understand how elements combine to form compounds and the properties of pure substances.
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