Elements
one
A compound consists of ______________ kinds of atoms chemically bound to each other.
two or more
In mixtures, particles are distributed ________________.
unevenly.
In mixtures of solution, substances are ____________ distributed.
evenly
All matter is made up of ___________________.
atoms
What is the smallest unit of an element that maintains all the properties of that element?
Atoms
Which of the these is a compound?
A. Helium
B. Baking Soda
C. Sea Water
B. Baking Soda
True or false: mixtures can be a mixture of solids, liquids, and/or gases.
True.
Mixtures can be any combination of all states of matter: solids, liquids, and gases.
True or false: Tymbark is a mixture
true
All __________ are made up of one type of substance, NOT 2 substances mixed together.
pure substance
How does a mixture differ from a Pure Substance?
Mixtures can be separated by physical means and Pure Substances cannot.
Do Compounds always have a set ratio of elements?
Yes.
Water is always made of two hydrogen and 1 oxygen
Provide 3 examples of mixtures like sandy water.
vegetable soup, oil and water, cereal, etc
Provide 3 examples of mixtures(solution) like salty water.
koolaid, food dye and water, salt water, etc
True or false: The particles in boiling water are moving slower than the particles in an ice cube.
False.
Particles at higher thermal energy move faster than those at lower thermal energy.
An Element is the same as a Pure Substance: True Or False
True
Which of these statements are true about compound?
A. Compounds can be found in the periodic table.
B. Compounds are pure substances.
C. Compounds are made up of two or more pure substances.
D. Compounds can be separated by physical means.
B and C
Compounds are pure substances and are made up of two or more elements.
*Elements can be found in the periodic table.
*Compounds can only be separated by chemical means.
Is a mixture chemically bonded?
No. mixtures are combined but not chemically like compounds.
Does mixing oil and water create a mixture? Why or why not?
Mixing oil and water creates a heterogeneous mixture because we can see the oil and the water.
Chemical bonds form when atoms share what? They share negatively charged particles. What are they?
electrons
Where you will find all elements.
Periodic table of elements
Why does air not have a definite formula?
(For example: water's formula is H20)
Air does not have a definite formula because it is not a compound.
Air is a mixture because it is a mixture of multiple different compounds like oxygen, carbon dioxide, hydrogen, and more.
If I have a coffee with milk, a caesar salad, trail mix and a yogurt for lunch, which of the these are mixtures like sandy water?
caesar salad and trail mix are heterogeneous mixtures.
What is another term we can use for homogeneous mixtures that contains a solute and solvent
Solution
List the 2 phase changes where thermal energy decreases:
freezing and condensation