EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
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 CAN NOT be changed? - Answer✔✔-Can NOT (except in stars)
electrons - Answer✔✔-are added as dots, starting on the
right, and move clockwise.
isotopes - Answer✔✔-Change in the number of Neutrons
ions - Answer✔✔-Change in the number of Electrons
isotopes (contd.) - Answer✔✔-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.
Page 1/8
, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
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...
Page 2/8
FIRST PUBLISH SEPTEMBER 2024
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 CAN NOT be changed? - Answer✔✔-Can NOT (except in stars)
electrons - Answer✔✔-are added as dots, starting on the
right, and move clockwise.
isotopes - Answer✔✔-Change in the number of Neutrons
ions - Answer✔✔-Change in the number of Electrons
isotopes (contd.) - Answer✔✔-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.
Page 1/8
, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
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...
Page 2/8
