Exam (elaborations)
BIO 107 - EXAM #1 – CSUN QUESTIONS AND ANSWERS (100% PASS)
- Course
- Bio 107
- Institution
- Washington State University - Pullman Campus
BIO 107 - EXAM #1 – CSUN QUESTIONS AND ANSWERS (100% PASS)
[Show more]
Content preview
©PREP4EXAMS@2024 [REAL-EXAM-DUMPS] Monday, July 29, 2024 12:15 PMBIO 107 - EXAM #1 – CSUN QUESTIONS AND ANSWERS (100% PASS)
All Matter including living organisms, are composed of: - ✔️✔️atoms and combinations of
atoms
Protons are: - ✔️✔️Positively charged particles located in the nucleus
Neutrons are: - ✔️✔️uncharged particles located in the nucleus
Electrons are: - ✔️✔️negatively charged particles found in orbitals surrounding the
nucleus
An Element is: - ✔️✔️a pure substance that cant be broken down into simpler
components by ordinary chemical or physical techniques.
Atoms combine chemically in fixed numbers and rations to form the: - ✔️✔️molecules
Each atom consists of an atomic __________ surrounded by negatively-charged
electrons - ✔️✔️Nucleus
The number of protons in a nuclei are called the: - ✔️✔️atomic number
The nuclei of all atoms also contain uncharged: - ✔️✔️neutrons
mass number = - ✔️✔️(# of protons) + (# of neutrons)
Isotopes are: - ✔️✔️distinct forms of atoms of an element with the same number of
protons but different numbers of neutrons.
Nuclei of some isotopes are unstable and break down giving off particles of matter and
energy, this is: - ✔️✔️radioactivity
The most important applications of radioisotopes are as labels or: - ✔️✔️tracers
1
, ©PREP4EXAMS@2024 [REAL-EXAM-DUMPS] Monday, July 29, 2024 12:15 PM
The region of space where an electron is found most frequently is its: - ✔️✔️orbital
Orbitals make up: - ✔️✔️energy levels or electron shells
electrons in an atoms outermost energy level are its: - ✔️✔️valence electrons
Atoms of reactive elements tend to combine into molecules by forming: - ✔️✔️Chemical
bonds
The five most important chemical interactions in biological molecules are: - ✔️✔️Covalent
bonds, Ionic bonds, Hydrogen bonds, Hydrophobic interactions, and Van Der Walls
Forces
Covalent bonds form when atoms share pairs of: - ✔️✔️valence electrons
for covalent bonds, stronger bonds are: - ✔️✔️shorter than longer bonds
In a nonpolar covalent bond: - ✔️✔️electrons are shared equally
In a polar covalent bond: - ✔️✔️electrons are shared unequally
In a polar covalent bond the atom that attracts the electrons: - ✔️✔️more strongly carries
a partial negative charge.
A cation carries a: - ✔️✔️positive charge
an anion carries a: - ✔️✔️negative charge
ionic bonds have three key features: - ✔️✔️-exert an attractive force
-force extends in all directions
-vary in strength
An atom with a high _________ will hold the electrons more tightly and have partial
negativity - ✔️✔️electronegativity
In nonpolar covalent bonds atoms have: - ✔️✔️no charge
2
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 OliviaWest. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now