Elements that are required by organisms in only minute qualities.
What are trace elements?
100
The charge of protons, and the charge of electrons.
What are positive and negative.
100
________________ are atoms of the same element that have the same number of protons but different number of electrons.
What are isotopes?
100
What is the atomic number of an element?
What is the number of protons?
100
Magnesium has an atomic number of 12 and a mass number of 24. The atomic mass is _____ Daltons.
What is 24?
200
The mass number of an element is calculated by adding the ______________ and ______________ in an atom of that element.
What protons and neutron?
200
The study of carbon compounds.
What is organic chemistry?
200
Which of the following solutions has the greatest concentration of hydrogen ions [H+]?
Bleach at pH of 12
Black coffee at pH of 6
Rainwater at pH of 5.6
Vinegar at pH of 3
What is vinegar at pH of 3?
200
What is the valence of an atom with 3 electrons on its outer shell?
What is 5?
200
What property of water allows a water strider to walk across the surface of a pond?
What is high surface tension?
300
What is the pH of a solution with a hydroxyl ion [OH-] concentration of 10 (-11)?
What is 3?
300
This is the slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule
What is a hydrogen bond?
300
In a water molecule, what holds the two hydrogen and one oxygen atom together? (Must be specific)
What are polar covalent bonds?
300
The four elements making up approximately 96% of living matter.
What are carbon, hydrogen, nitrogen, and oxygen.
300
The pH of a solution went from 6 to 5, what happened to its [H+] and [OH-] concentrations?
What is increased 10x and decreased 10x?
400
Isomers that differ in covalent arrangements of their atoms.
What are structural isomers?
400
Type of isomer that has variations in arrangement around a double bond.
What are geometric isomers?
400
Carbon is likely to form this type of bond with other atoms.
What is a covalent bond?
400
The belief that only a living organism could create organic molecules from inorganic matter.
What is vitalism?
400
What temperature is water at its most dense?
What is 4 degrees Celsius?
500
How many molecules of water are needed to hydrolyze a polymer that is 8 monomers long?
What is 7?
500
The amount of heat required to raise the temperature of one kg of water by 1 degrees Celsius.
What is a kilocalorie?
500
Absorption and release of heat when hydrogen bonds break and form is a result of this property of water?
What is high specific heat?
500
The molecular formula for glucose is written on the board. Determine the molecular formula for a molecule that is made by linking four glucose molecules together by dehydration reactions?
What is C 24, H 42, O 23?
500
This polysaccharide is a major structural component in cell walls.