Exam (elaborations)
My Lab and Mastering Biology Chapter 1 and 2 Questions and Answers 2024
- Course
- Institution
My Lab and Mastering Biology Chapter 1 and 2
[Show more]
Content preview
My Lab and Mastering Biology Chapter 1and 2
A substance that cannot be broken down into other substances by ordinary chemical
procedures is a(n) _____.
a. compound
b. isotope
c. element
d. molecule
e. proton – answer c. element
Which of the following subatomic particles always has a positive charge?
a. element
b. proton
c. neutron
d. atom
e. electron - answerb. proton
Changing the number of _____ would change an atom into an atom of a different
element.
a. bonds formed by an atom
b. protons in an atom
c. electrons circling the nucleus of an atom
d. neutrons in an atom
e. particles in the nucleus of an atom - answerb. protons in an atom
The atoms of different phosphorus isotopes __________.
a. have different numbers of neutrons
b. react differently with other atoms
c. have different atomic numbers
d. have different numbers of electrons
e. have different numbers of protons - answera. have different numbers of neutrons
The type of bonding and the numbers of covalent bonds an atom can form with other
atoms are determined by __________.
a. the number of protons
b. the number of neutrons
c. the size of the atom; smaller atoms are chemically more reactive
d. the nucleus
e. the number of unpaired electrons in the valence shell - answere. the number of
unpaired electrons in the valence shell
, An ionic bond is formed when __________.
a. one atom transfers an electron to another atom
b. both atoms are nonpolar
c. both atoms are electrically neutral
d. atoms are subjected to radioactive isotopes
e. both atoms are equally attractive to electrons - answera. one atom transfers an
electron to another atom
Hydrogen bonding is most often seen _____.
a. when multiple carbon atoms are present
b. when the bonds within the molecule are nonpolar covalent bonds
c. in molecules whose three-dimensional shape is tetrahedral
d. if the molecule consists of three or fewer atoms
e. when hydrogen is covalently bonded to an electronegative atom - answere. when
hydrogen is covalently bonded to an electronegative atom
Chemical equilibrium is reached when __________.
a. all of the reactants are converted to products
b. the reverse reaction begins to occur
c. the forward and reverse reactions occur at the same rate so that the concentrations
of reactants and products remain the same
d. matter is conserved
e. the rate at which matter is destroyed and the rate at which it is created offset each
other - answerc. the forward and reverse reactions occur at the same rate so that the
concentrations of reactants and products remain the same
Water molecules have a polarity, which allows them to be electrically attracted to other
water molecules and other polar molecules by weak chemical bonds known as _____.
a.
b.
c.
d.
e. hydrogen bonds - answere. hydrogen bonds
Many of water's emergent properties, such as its cohesion, its high specific heat, and its
high heat of vaporization, result from the fact that water molecules _____.
a. are very small
b. are attracted to each other by partial negative and positive charges on the oxygen
and hydrogen atoms, respectively
c.
d.
e. - answerb. are attracted to each other by partial negative and positive charges on the
oxygen and hydrogen atoms, respectively
Because organisms are made primarily of water, they resist rapid temperature changes.
This useful quality is based on water's _____.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now