Exam (elaborations)
Biology 114 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
- Course
- Institution
Biology 114 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
[Show more]
Content preview
Biology 114 Exam 1 | Questions And Answers Latest {2024- 2025} A+ Graded| 100% Verified
Anything that has mass and takes up space - matter
a substance that cannot be broken down to other substances by chemical reactions - Element
a substance consisting of two or more different elements combined in a fixed ratio (type of bond does
not matter) - compound
What percent of the 92 naturally occurring elements are essential to human life? - 20-25%
nitrogen deficiency? - short corn plants
iodine deficiency? - goiter
smallest unit of matter that still retains the properties of an element - atom
How much smaller are electrons than p+ and n0? - 2000 times smaller
nucleus decays spontaneously giving off particles and energy - unstable radioactive isotopes
electrons have ____ (what kind of energy) - potential energy
The more distant an electron is from the nucleus the ____ its potential energy - greater
1st shell max electrons? - 2
2nd shell max electrons? - 8
,3rd shell max electrons? - 8
Electron shells are most stable when they are ____ - full
electrons on the outermost electron shell - valence electrons (chemical behavior is determined by this)
Elements with a full valence shell are - nonreactive
How do chemical bonds form? - atoms with incomplete valence shells can share or transfer electrons
with other atoms
Nonpolar covalent bonds - shared equally (ex. H2)
Polar covalent bonds - not shared equally (ex. H2O)
ionic bonds - bonds resulting from the loss or gain of electrons by bonded atoms (ex. NaCl) weaker than
covalent
hydrogen bonds - weak bond formed between a hydrogen atom in a polar compound and an
electronegative atom in another polar compound
Vanderwaals force - very weak bonds resulting from impermanent shifting of charges because electrons
are constantly moving
molecule - consists of two or more atoms held together by covalent bonds
Vitamin B12 deficiency causes? (It's absorbed in our guts) - anemia
electronegativity - an atom's attraction for the electrons in a covalent bond
, What is electronegativity affected by? - atomic number and distance at which its valence electrons
reside from the nucleus
Tell me about electronegativity and nonpolar covalent molecules - atoms are equally electronegative
and share valence electrons equally
Tell me about electronegativity and polar covalent molecules - one atom is more electronegative and
the atoms do not share valence electrons equally
What does unequal sharing of electrons cause? - partial positive or negative charge for each atom
Tell me about loss and gain of electrons in ionic bonds and the attraction - the more electronegative
atom strips a valence electron completely away from its partner; its an attraction between a cation and
an anion
Ion? - a charged atom (or molecule)
Ionic compounds are also known as - salts
Tell me about electronegativity and hydrogen bonds. - attraction between a hydrogen (partial +) in a
polar compound and an electronegative atom (partial -) in a second polar compound, in most living cells
the counterparts are N and O
Tell me about the interactions with vanderwaal forces and give me 2 examples - dependent on how
much surface one molecule exposes to its neighbors; example is vaseline sticking together and geckos
climb upside down, they are large nonpolar molecules
What does morphine bind to - endorphin receptors
study of the chemical processes in living organisms - Biochemistry
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 oneclass. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now