Elements, mixtures and compounds (AQA GCSE Chemistry Combined Science): Flashcards
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Practise the cards
15 cards from this deck
What is a pure element made of?
What is a pure element made of?
Only one type of atom
What is a pure compound made of?
What is a pure compound made of?
Different atoms joined together
What is a mixture?
What is a mixture?
Two or more substances mixed but not chemically joined
What are atoms?
What are atoms?
Building blocks of matter
What is the smallest piece of an element?
What is the smallest piece of an element?
Atom
What is a substance with one atom type called?
What is a substance with one atom type called?
Element
Approx. number of elements
Approx. number of elements
About 100
What identifies each element?
What identifies each element?
Chemical symbol
How do compounds form?
How do compounds form?
Atoms of different elements join in a chemical reaction
What holds atoms together in compounds?
What holds atoms together in compounds?
Chemical bonds
How are elements combined in compounds?
How are elements combined in compounds?
Fixed proportions
Compound properties vs original elements?
Compound properties vs original elements?
Completely different properties
How to separate compounds?
How to separate compounds?
Chemical reactions
Are substances in mixtures chemically bonded?
Are substances in mixtures chemically bonded?
No, not chemically bonded
How to separate mixtures?
How to separate mixtures?
Physical methods