Elements and Compounds
What is oxygen on the periodic table?
element
What is a mixture in which one substance dissolves evenly in another?
solution
Are all solutions homogeneous mixtures?
yes
How do solid particles move?
vibrate in place
What is the process when a solid turns directly to a gas?
sublimation
What is NaCl?
compound
What is the best way to separate salt from water?
Boil the water to evaporate the water to leave the salt.
What type of mixture is Chex Mix and Trail mix?
heterogeneous
What is the process of a liquid changing to a gas?
evaporation
Which type of mixture can you see all the different parts?
heterogeneous
Give an example of a pure substance.
oxygen, carbon, salt, sugar
What part of a solution does the dissolving?
solvent
Which 2 are mixtures: gold, air, water, saltwater
air and saltwater
What happens to the particles in matter when heat is added?
particles speed up and separate
Why is H2O considered a compound?
the hydrogen and oxygen atoms are chemically combined
Is water an element, compound or mixture?
compound
What part of a solution is the part that needs to dissolve?
solute
Write 3 things that can be used to separate mixtures?
hand, spoon, tweezers, magnet, filter, sifter, water
Where did the dry ice receive its heat energy during our dry ice lab? (or any time when being used)
the water or the air
Why are dirt and air considered mixtures?
both have parts that are not chemically joined together, but have separate parts
Why isn't sugar water a compound?
The sugar and water are physically mixed, not chemically bonded.
Why are all solutions also homogeneous mixtures?
You cannot see separate components.
What substance has particles that do not dissolve?
suspension
What needs to happen in order for a state of matter to change its state?
heat needs to be added or removed
Why is the slime we made considered a colloid?
some of the particles did not dissolve but can't be seen