Elements and Compounds
Mixtures
Properties of Water
Periodic Table
pH
Conservation of Mass
100
This is the simplest form of matter, made of only one kind of atom.
What is an element
100
This type of substance is made out of components that are uniformly spread out?
Homogenous mixture
100
This allows water molecules to stick to each other
what is cohesion
100
How can the periodic table you identify elements
The periodic table helps you identify elements by showing their atomic number (protons), symbol, and grouping them by similar properties.
100
This is value that determines if a substance is acidic or basic
what is pH
100
How do we know if that conservation of mass holds true for a reaction?
If the number of atoms and the mass is conserved from the reactants to products
200
Oxygen (O₂), gold (Au), and iron (Fe) are all examples of this.
What are elements
200
You can see the layers of components in this type of mixture
What is heterogenous mixture
200
This allows water to stick to other surfaces
what is adhesion
200
Identify the elements in the following:
4Fe + 3O2 → 2Fe2O3
Fe = iron
O = oxygen
200
What makes a substance an acid? How do we know if it is a strong acid or not?
an acid is any substance with a pH value below 7. The lower that pH value, the stronger the acid.
200
How many oxygens are in the reactants of the following equation?
12H₂S + 6CO₂ → C₆H₁₂O₆ + 6H₂O + 12S
12 Oxygens
300
Water (H₂O) and carbon dioxide (CO₂) are examples of this type of pure substance.
What are compounds
300
Which represents a homogenous mixture and heterogenous mixture
Left = homogenous
Right = heterogenous
300
What do you call it when cohesion and adhesion work together to pull water upward through a narrow tube in a plant?
what is Capillary Action
300
Matt mixes baking soda(NaHCO₃) and vinegar (CH₃COOH) producing a white/cloudy precipitate of sodium acetate (CH₃COONa). What elements are in the precipitate?
CH₃COOH + NaHCO₃ → CH₃COONa + H₂O + CO₂
C = carbon
H = hydrogen
O = oxygen
Na = sodium
300
What makes a substance a base? How do we know if its a strong or weak base?
A base is a substance that has a pH above 7. The higher the pH value the stronger the base
300
What is the total amount of irons before and after the reaction in the following equation?
4Fe + 3O2 → 2Fe2O3
4 irons
400
Describe the difference between an element and compounds
Elements are made of one type of atom while compounds are made of two or more different types of atoms that are chemically bonded
400
What type of mixture is this example?
What is heterogenous
400
Water climbing up a stem of a tree is the result of what water properties
cohesion and adhesion
400
What elements are K, N, O, P, Ni, Cl
K = potassium
N = Nitrogen
O = Oxygen
P = Prosperous
Ni = Nickle
Cl = Chlorine
400
A student put electrical wires attached to a light bulb into a beaker of HCl. The light bulb began to shine brightly. They measured the pH and found it was 2. What does that say about the HCl
It is a strong acid and strong electrolytes
400
A student combines methane with oxygen to create a combustion reaction. The student produces 68 grams of carbon dioxide and 2 grams of water. The equation is as followed:
CH₄+ 2O₂ → CO₂+ 2H₂O
If the student used 27 grams of methane, how much oxygen is needed for the reaction?
43 grams
500
Which represents an element and which are compounds?
X = elements
Y = compounds
500
Which of the following are heterogenous mixtures?
1. Sand and water
2. Sugar and water
3. Oil and vinegar
4. Iron fillings and sulfur powder
1, 3, 4
500
John is observing water droplets on the surface of a leaf after a rainstorm. She notices that the droplets are rounded and do not spread out.
What property of water is responsible for this behavior?
Surface Tension
500
What elements are present in the following equation?
SnO2 + 2H2 → Sn + 2H2O
Sn = Tin
O = Oxygen
H = Hydrogen
500
what are characteristics of bases
can taste bitter, feel slippery and turns indicators blue
500
6CO₂ + 6H₂O + Light energy → C₆H₁₂O₆ + 6O₂
If a plant uses 21 grams of carbon dioxide and 79 grams of water, and produces 64 grams of oxygen, how much glucose is also produced
36 grams
600
What is made of multiple elements, cannot be separated by physical means and has a fixed ratio of components?
A compound
600
This is the main difference between a compound and a mixture.
compounds are chemically combined, mixtures are physically combined?
600
Describe the phenomena in this picture 
Adhesion pulls the water molecules upward through the spaces between the paper towel fibers while cohesion keeps them together.
600
Identify the elements in the following equation
12H₂S + 6CO₂ → C₆H₁₂O₆ + 6H₂O + 12S
H = Hydrogen
S = Sulfur
C = Carbon
O = Oxygen
600
A student puts vinegar on a litmus paper and it turns red. Is the vinegar an acid or base?
an acid
600
What can you say about the number of carbon atoms from the beginning to the end of this reaction?
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
The number of carbon atoms remained constant.