Chemical Symbols
The Atom
Bonding
Compounds Important to Living Things
More Compounds Important to Living Things
100
What is the chemical symbol for oxygen?
O
100
What is mass number?
the sum of the protons and neutrons
100
What is another word for stable?
inert
100
What are the two most important inorganic compounds?
water and carbon dioxide
100
What does organic mean?
containing carbon and hydrogen bonded together
200
What is the chemical symbol for nitrogen?
N
200
What is the electrical charge on an atom as a whole?
neutral
200
Why do atoms bond?
to complete the outermost energy level
200
____________ makes up approximately 60-70% of all organisms.
water
200
What are the four most important organic compounds?
carbohydrates, proteins, lipids, nucleic acids
300
What is the chemical symbol for Chlorine?
Cl
300
Where in the atom are the neutrons and protons located?
nucleus
300
How many electrons does the first shell hold?
2
300
What are the six elements that make up most substances found in living things?
carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfer
300
Proteins are made up of _________________
amino acids
400
What is the the chemical symbol for sodium?
Na
400
What is an atomic number?
number of protons in a nucleus
400
What type of bond occurs when electrons are shared?
covalent
400
What is a disaccharide?
two monosaccharides bonded together (double sugar)
400
Sucrase and lactase are examples of _______________
enzymes (because they end in "ase")
500
What is the chemical symbol for potassium?
K
500
What is the mass of an electron?
1/1836 AMU
500
What type of bond occurs when electrons are transferred?
ionic
500
What does DNA do?
control cell activity and determine heredity
500
What is glycogen?
animal starch stored in the liver for energy
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