Exam (elaborations)
Mastering Biology Exam 1 with correct Answers
- Course
- Institution
Mastering Biology Exam 1 with correct Answers
[Show more]
Content preview
Mastering Biology Exam 1 with correctAnswers
mass of ~1 amu - Answer -protons and neutrons
mass of ~1/200o amu - Answer -electrons
The innermost electron shell of an atom can hold up to _____ electrons. - Answer -2
Which of these relationships is true of an uncharged atom? - Answer -The number of
protons is equal to the number of electrons.
What determines the types of chemical reactions that an atom participates in? - Answer
-the number of electrons in the outermost electron shell
The mass number of an atom is 15, and its atomic number is 7. The atom probably
has... - Answer -8 neutrons in the nucleus.
Which statement is true of atoms? - Answer -Electrons determine the atom's size.
Dr. Jones says an atom has 3 electrons in the first shell and four electrons in the
second shell. Someone should tell Dr. Jones that ... - Answer -the first shell shouldn't
have 3 electrons.
Which statement is true of the energy levels of electrons in shells? - Answer -The
valence shell has higher energy than other occupied shells.
Which statement is true of the atom shown in the diagram? - Answer -*An electron will
move from the outer to the inner shell.
* The atom has more than one valence electron.
*The atom is in the excited state.
*All of the above.
Two atoms always represent the same element if they have ... - Answer -the same
number of protons.
An atom has 6 electrons, 6 protons, and 6 neutrons. You can tell that this atom belongs
to the element _____ because _____________________. - Answer -C; it has 6 protons.
, An atom has 8 protons, 8 neutrons, and 8 electrons. Another isotope of the same
element might have ... - Answer -10 neutrons.
Radioactive decay is likely to occur when ... - Answer -an atom has too many neutrons.
Which model most accurately represents the current view of the structure of the atom? -
Answer -Probability model
Which statement is most useful in explaining why chemists assign atoms to chemical
elements by counting protons?
*99% of the atom's mass consists of protons.
*The nucleus doesn't change in stable isotopes.
*The proton's negative charge holds electrons in the atom.
*Protons at the atom's surface determine the atom's behavior.
*None of these. Elements are defined by the number of protons. - Answer -None of
these. Elements are defined by the number of protons.
What type of bond is joining the two hydrogen atoms? - Answer -covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - Answer -
molecule
This atom can form up to _____ single covalent bond(s). - Answer -4
A(n) _____ bond joins these two oxygen atoms. - Answer -double covalent
Atoms with the same number of protons but with different electrical charges _____. -
Answer -are different ions
In salt, what is the nature of the bond between sodium and chlorine? - Answer -ionic
What is the result of the animated process? - Answer -a positively charged sodium ion
and a negatively charged chlorine ion
An ionic bond involves _____. - Answer -an attraction between ions of opposite charge
Which of these figures correctly illustrates the nature of the bonding of H2O? - Answer -
What type of bond joins the carbon atom to each of the hydrogen atoms? - Answer -
single (nonpolar) covalent
The brackets are indicating a(n) _____ bond. - Answer -hydrogen
What name is given to the bond between water molecules? - Answer -hydrogen
Hydrogen bonding - Answer -
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 STASSUKHAREV. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83100 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now