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Biology Exam 1 MGCCC Questions and Answers 2024/2025 $12.49   Add to cart

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Biology Exam 1 MGCCC Questions and Answers 2024/2025

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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 ...

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Biology Exam 1 MGCCC Questions and
Answers 2024/2025
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


1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

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.




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

1|Page| GradeA+ | 2 0 0 2 5

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