Biology Exam 1 MGCC Study Guide with
Verified Solutions
Atomic Number - Answer-The Number of Protons in the
Nucleus.
Cation - Answer-Atom with a positive charge (more protons than electrons)
Anion - Answer-Atom with a negative charge (more electrons than protons)
he number of Protons CAN or C...
Uses for Isotopes - Answer✔✔-Medicine (PET scans, FDA approved isotopes, C14 traces how carbon
moves through plants, Radiometic dating..)
half life - Answer✔✔-Time it takes for an atom to lose 50% of its energy
covalent bond - Answer✔✔-electrons are shared
ionic bond - Answer✔✔-electrons are taken
hydrogen bond - Answer✔✔-weak attraction between slightly charged atoms
and a hydrogen atom
covalent bond example - Answer✔✔-oxygen
ionic bond example - Answer✔✔-salt
hydrogen bond example - Answer✔✔-water
H2O - Answer✔✔-H and 0 share electrons, but not evenly. We call this a
Polar Covalent Bond!
hydrogen bond (contd.) - Answer✔✔-weak attraction between a slightly + H, and a
slightly -atom on some other molecule.
adhesion - Answer✔✔-H2O H-bonds to other H2O
cohesion - Answer✔✔-H2O H-bonds to anything else
hydrogen bonds are.... - Answer✔✔-wea. They form and break very easily...
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