Bio 1010 - General Biology » Summer 2022 » Homework 3 Assignment

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Question #1
The negatively charged particles of an atom are called ________________.
A.   protons
B.   neutrons
C.   electrons
Question #2
The positively charged particles of an atom are called ________________ .
A.   electrons
B.   protons
C.   neutrons
Question #3
How a substance will react with other chemicals is determined by the number of electrons in its _________________________________.
A.   valence shell
B.   atom
C.   charge
Question #4
In which type of chemical bond are the electrons completely transferred from one atom to another?
A.   polar bond
B.   neutral bond
C.   ionic bond
Question #5
In this type of chemical bond, atoms share electrons, but the resulting molecules have no positive or negative charges. _____________________
A.   polar covalent bond
B.   covalent bond
C.   non-polar covalent bond
Question #6
A positive ion:
A.   has gained electorns
B.   has lost electrons
C.   is sharing electrons with another ion
D.   has an equal number of protons and electrons
E.   has gained protons
Question #7
The half life of 131I (iodine 131) is eight days. If you had 12 grams of 131I, how long would it take for the 12 grams to decay to 3 grams?
A.   32 days
B.   16 hours
C.   16 days
D.   8 days
E.   8 minutes
Question #8
The lower the pH:
A.   the greater the number of hydrogen ions released
B.   all of these
C.   the more acidic the solution
D.   the lower the number on the pH scale

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