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Biology 114 Exam 1(Tyler Hodges The University of Alabama); Questions & Answers 100% Verified $15.99
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Biology 114 Exam 1(Tyler Hodges The University of Alabama); Questions & Answers 100% Verified

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Biology 114 Exam 1(Tyler Hodges The University of Alabama); Questions & Answers 100% Verified Anything that has mass and takes up space Correct answer-matter a substance that cannot be broken down to other substances by chemical reactions Correct answer-Element a substance consisting of t...

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  • August 9, 2024
  • 36
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • biology 114 exam 1tyler hodges the university of
  • university of alabama questions answers

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Biology 114 Exam 1( Tyler Hodges The
University of Alabama); Questions & Answers
100% Verified
Anything that has mass and takes up space Correct answer-matter




a substance that cannot be broken down to other substances by chemical reactions
Correct answer-Element




a substance consisting of two or more different elements combined in a fixed ratio (type of
bond does not matter) Correct answer-compound




What percent of the 92 naturally occurring elements are essential to human life? Correct
answer-20-25%




nitrogen deficiency? Correct answer-short corn plants




iodine deficiency? Correct answer-goiter




smallest unit of matter that still retains the properties of an element Correct answer-
atom




How much smaller are electrons than p+ and n0? Correct answer-2000 times smaller

, Biology 114 Exam 1( Tyler Hodges The
University of Alabama); Questions & Answers
100% Verified
nucleus decays spontaneously giving off particles and energy Correct answer-unstable
radioactive isotopes




electrons have ____ (what kind of energy) Correct answer-potential energy




The more distant an electron is from the nucleus the ____ its potential energy Correct
answer-greater




1st shell max electrons? Correct answer-2




2nd shell max electrons? Correct answer-8




3rd shell max electrons? Correct answer-8




Electron shells are most stable when they are ____ Correct answer-full




electrons on the outermost electron shell Correct answer-valence electrons (chemical
behavior is determined by this)




Elements with a full valence shell are Correct answer-nonreactive

, Biology 114 Exam 1( Tyler Hodges The
University of Alabama); Questions & Answers
100% Verified

How do chemical bonds form? Correct answer-atoms with incomplete valence shells can
share or transfer electrons with other atoms




Nonpolar covalent bonds Correct answer-shared equally (ex. H2)




Polar covalent bonds Correct answer-not shared equally (ex. H2O)




ionic bonds Correct answer-bonds resulting from the loss or gain of electrons by bonded
atoms (ex. NaCl) weaker than covalent




hydrogen bonds Correct answer-weak bond formed between a hydrogen atom in a polar
compound and an electronegative atom in another polar compound




Vanderwaals force Correct answer-very weak bonds resulting from impermanent shifting
of charges because electrons are constantly moving




molecule Correct answer-consists of two or more atoms held together by covalent bonds




Vitamin B12 deficiency causes? (It's absorbed in our guts) Correct answer-anemia

, Biology 114 Exam 1( Tyler Hodges The
University of Alabama); Questions & Answers
100% Verified

electronegativity Correct answer-an atom's attraction for the electrons in a covalent bond




What is electronegativity affected by? Correct answer-atomic number and distance at
which its valence electrons reside from the nucleus




Tell me about electronegativity and nonpolar covalent molecules Correct answer-atoms
are equally electronegative and share valence electrons equally




Tell me about electronegativity and polar covalent molecules Correct answer-one atom is
more electronegative and the atoms do not share valence electrons equally




What does unequal sharing of electrons cause? Correct answer-partial positive or
negative charge for each atom




Tell me about loss and gain of electrons in ionic bonds and the attraction Correct answer-
the more electronegative atom strips a valence electron completely away from its partner; its
an attraction between a cation and an anion




Ion? Correct answer-a charged atom (or molecule)

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