1.1 Particle Theory
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Science
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12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the particle theory of matter?
Back
The particle theory of matter states that all matter is made up of tiny particles that are in constant motion. The properties of substances depend on the arrangement and movement of these particles.
2.
FLASHCARD QUESTION
Front
What defines a polar covalent molecule?
Back
A polar covalent molecule is defined by the unequal sharing of electrons between atoms, resulting in a molecule with a partial positive charge on one end and a partial negative charge on the other.
3.
FLASHCARD QUESTION
Front
What is a hydrogen bond?
Back
A hydrogen bond is a weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom. It plays a crucial role in determining the properties of water.
4.
FLASHCARD QUESTION
Front
What is specific heat capacity?
Back
Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius. Water has a high specific heat capacity due to hydrogen bonding.
5.
FLASHCARD QUESTION
Front
Why is ice less dense than liquid water?
Back
Ice is less dense than liquid water because, in its solid state, water molecules form a crystalline structure that spaces them further apart compared to the liquid state.
6.
FLASHCARD QUESTION
Front
What is the difference between a compound and a mixture?
Back
A compound is a substance formed when two or more elements chemically bond together, while a mixture is a combination of two or more substances that retain their individual properties.
7.
FLASHCARD QUESTION
Front
What is a chemical bond?
Back
A chemical bond is a strong force of attraction that holds atoms together in a substance, which can be ionic, covalent, or metallic.
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