What are the three categories that substances can be divided into?
Elements
Compounds
Mixtures
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Elements
Elements are substances made of atoms that all contain the same amount of protons.
Cannot be split into anything simpler.
There are 118 elements in the periodic table
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Compounds
The combinations of 2 or more chemically joined elements.
Cannot be separated to elements by physical means.
Unlimited amounts of compounds.
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Mixtures
A combination of two or more elements that are not chemically joined.
Can be separated using physical means.
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What do all substances consist of?
Atoms
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What are atoms?
Atoms are the building blocks of all matter.
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What are the subatomic particles called that an atom is made of?
Protons, neutrons and electrons.
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What does the nucleus consist of?
Protons and neutrons which is at the centre of the atom.
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What are the orbital paths called that electrons travel around the atoms?
Outer shells.
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Where is the mass of an atom?
The mass of an atom is where the protons and neutrons are located hence the mass of the electrons is negligible.
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Other cards in this set
Card 2
Front
Elements
Back
Elements are substances made of atoms that all contain the same amount of protons.
Cannot be split into anything simpler.
There are 118 elements in the periodic table
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