Chemical Compounds and Reactions
Flashcard
•
Science
•
6th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical compound?
Back
A chemical compound is a substance formed when two or more different elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.
2.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements that are chemically combined.
3.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
The chemical formula for water is H2O, which indicates it is made of two hydrogen atoms and one oxygen atom.
4.
FLASHCARD QUESTION
Front
What is rust and how is it formed?
Back
Rust is a reddish-brown oxide that forms on iron and its alloys due to a chemical reaction with oxygen and moisture in the environment.
5.
FLASHCARD QUESTION
Front
What is surface tension?
Back
Surface tension is the property of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules. It enables some insects to 'walk on water'.
6.
FLASHCARD QUESTION
Front
What is a neutron?
Back
A neutron is a subatomic particle found in the nucleus of an atom, with no electric charge. It contributes to the mass of the atom.
7.
FLASHCARD QUESTION
Front
What is adhesion in terms of water properties?
Back
Adhesion is the tendency of water molecules to stick to other substances, which helps in processes like capillary action.
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