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Biology 114 Exam 1 Prep (Answered) 284 Questions and Correct Answers With Complete Verified Solution. 100% Correct | Latest Update Fall 2024/2025. $12.99
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Biology 114 Exam 1 Prep (Answered) 284 Questions and Correct Answers With Complete Verified Solution. 100% Correct | Latest Update Fall 2024/2025.
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  • Biology 114
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  • Eastern Iowa Community College District

Biology 114 Exam 1 Prep (Answered) 284 Questions and Correct Answers With Complete Verified Solution. 100% Correct | Latest Update Fall 2024/2025.

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  • August 16, 2024
  • 21
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • biology 114 exam 1 prep answered 284 questions a

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Biology 114 Exam 1 Prep (Answered) 284 Questions
and Correct Answers With Complete Verified Solution.
100% Correct | Latest Update Fall 2024/2025.
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 structure of a water molecule is highly ___ because oxygen atoms have much higher
electronegativity than hydrogen atoms

polar covalent

In a water molecule, oxygen has a partial ____ charge and hydrogens have partial ____ charge

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