Biology Exam 1 MGCCC Questions
and Answers 100% Pass
Atomic Number - ✔✔The Number of Protons in the
Nucleus.
Cation - ✔✔Atom with a positive charge (more protons than electrons)
Anion - ✔✔Atom with a negative charge (more electrons than protons)
he number of Protons CAN or CAN NOT be changed? - ✔✔Can NOT (except in stars)
electrons - ✔✔are added as dots, starting on the
right, and move clockwise.
isotopes - ✔✔Change in the number of Neutrons
ions - ✔✔Change in the number of Electrons
isotopes (contd.) - ✔✔Neutrons stabilize an atom and keep the protons and electrons
from
pulling each other apart.
When the number of neutrons is changed, the atom destabilizes and
becomes radioactive.
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, Uses for Isotopes - ✔✔Medicine (PET scans, FDA approved isotopes, C14 traces how
carbon moves through plants, Radiometic dating..)
half life - ✔✔Time it takes for an atom to lose 50% of its energy
covalent bond - ✔✔electrons are shared
ionic bond - ✔✔electrons are taken
hydrogen bond - ✔✔weak attraction between slightly charged atoms
and a hydrogen atom
covalent bond example - ✔✔oxygen
ionic bond example - ✔✔salt
hydrogen bond example - ✔✔water
H2O - ✔✔H and 0 share electrons, but not evenly. We call this a
Polar Covalent Bond!
hydrogen bond (contd.) - ✔✔weak attraction between a slightly + H, and a
slightly -atom on some other molecule.
adhesion - ✔✔H2O H-bonds to other H2O
cohesion - ✔✔H2O H-bonds to anything else
hydrogen bonds are.... - ✔✔wea. They form and break very easily...
like high school relationships
Collectively, hydrogen bonds are.... - ✔✔STRONG
hydrophillic - ✔✔"water loving"
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
and Answers 100% Pass
Atomic Number - ✔✔The Number of Protons in the
Nucleus.
Cation - ✔✔Atom with a positive charge (more protons than electrons)
Anion - ✔✔Atom with a negative charge (more electrons than protons)
he number of Protons CAN or CAN NOT be changed? - ✔✔Can NOT (except in stars)
electrons - ✔✔are added as dots, starting on the
right, and move clockwise.
isotopes - ✔✔Change in the number of Neutrons
ions - ✔✔Change in the number of Electrons
isotopes (contd.) - ✔✔Neutrons stabilize an atom and keep the protons and electrons
from
pulling each other apart.
When the number of neutrons is changed, the atom destabilizes and
becomes radioactive.
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, Uses for Isotopes - ✔✔Medicine (PET scans, FDA approved isotopes, C14 traces how
carbon moves through plants, Radiometic dating..)
half life - ✔✔Time it takes for an atom to lose 50% of its energy
covalent bond - ✔✔electrons are shared
ionic bond - ✔✔electrons are taken
hydrogen bond - ✔✔weak attraction between slightly charged atoms
and a hydrogen atom
covalent bond example - ✔✔oxygen
ionic bond example - ✔✔salt
hydrogen bond example - ✔✔water
H2O - ✔✔H and 0 share electrons, but not evenly. We call this a
Polar Covalent Bond!
hydrogen bond (contd.) - ✔✔weak attraction between a slightly + H, and a
slightly -atom on some other molecule.
adhesion - ✔✔H2O H-bonds to other H2O
cohesion - ✔✔H2O H-bonds to anything else
hydrogen bonds are.... - ✔✔wea. They form and break very easily...
like high school relationships
Collectively, hydrogen bonds are.... - ✔✔STRONG
hydrophillic - ✔✔"water loving"
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
