Chemistry Set 1 Flashcards
What does Chemistry help us to do?
Chemistry helps us to understand the world around us
A substance can take on different forms because of…
Temperature and pressure affect the form a substance can take.
What are the three well known states of matter?
Solid, Liquid and Gas are the three well known states of matter.
What are the other states of matter?
Plasma and Bose-Einstein Condensates (BECs)
What is plasma?
Plasma is similar to gas but contains free-moving electrons and ions (atoms that have lost electrons)
What is Bose-Einstein Condensates (BECs)
BECs are waves of matter than occur when some atoms are at super cold temperatures
What keeps particles together?
Particles are kept together by forces between particles and pressure on the particles from the outside.
If we warm up particles (add energy) what happens?
When you add energy, the particles start to move faster and spread apart.
What does the movement of particles affect?
The particle movement has an affect on the state of matter – solid, liquid etc
Define a solid.
A solid has particles that are very close to each other, the bonds are very strong, and they are not moving around much. Solids keep their shape
Define a liquid.
A liquid the forces between the particles are weaker than in solids, particles are still fairly close, liquids can move around freely and don’t have a fixed shape.
Define gasses.
Gasses are often invisible, but they are all around us. Some are essential and some are poisonous. Gasses have fast moving particles and have no form.
What are the two types of gasses?
The two types of gasses are elemental and compounds.
What are elemental gasses?
Elemental gasses are made of a single element
what are compound gasses?
Compound gasses are made up of more than one element
