Exam (elaborations)
Structure of the ATOM Questions and Answers 2024
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Structure of the ATOM
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Structure of the ATOMNucleus of an atom - answer center of an atom
has a positive charge
contains protons and neutrons
Why does an atom's NUCLEUS have a POSITIVE CHARGE? - answer The PROTONS
have a POSITIVE CHARGE (+) while the NEUTRONS have a NEUTRAL CHARGE (no
charge)
Protons - answer Subatomic particle located in the nucleus of an atom
Positive (+) charge
What is unique for each element? - answer The number of protons
Neutrons - answer Subatomic particle located in the nucleus of an atom
Neutral or No charge
What is the job of a neutron? - answer The neutrons hold the nucleus together
(because...protons with their positive charge push each other away) so the neutrons
hold the nucleus together (with a strong force).
The neutrons keep the atom STABLE
3 protons are ripped out of a Lead (Pb; atomic number 82) atom. What have you done?
- answer The nucleus now has 79 protons.
The number of protons is unique to each element. The element is GOLD (Au; atomic
number 79)
Electrons - answer Subatomic particle located in orbitals (the electron cloud)
surrounding the nucleus.
Negative (-) charge
Bohr Model - answer A model resembling planets revolving around the sun, useful in
visualizing the structure of atoms
Electron cloud - answer A region around the nucleus of an atom where electrons are
likely to be found
How does the diameter of the electron cloud compare to the diameter of the nucleus? -
answer The electron cloud is ~100,000 BIGGER across than the nucleus.
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