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9th Grade Physical Science. The Atom Questions and Answers Graded A+
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9th Grade Physical Science. The Atom
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9th Grade Physical Science. The AtomIsotopes - answer Atoms of the same
element (same number of protons)
that have different numbers of
neutrons in their nucleus.
Neutral Atom - answer_ _____________ has the same number of positive and negative
charges
Ions - answer Atoms that are not electrically neutral. They have either lost or gained
electrons. Atoms do not lose or gain protons!!!
Danish physicist _____ _____proposed the concept of energy levels to explain the
spectrum of hydrogen. - answer Neils Bohr
In the center most ring there are at most __ Electrons - answer2
In the second inner most ring there are at most __ Electrons - answer8
In the third mst inner ring there are at most __ Electrons - answer8
In the outer most ring there are at most __ Electrons - answer18
What is the Bohr model of the atom? - answerA model that says there are energy levels
around the nucleus and that the electrons can only be found in these specific locations.
What is/are the rule(s) for filling energy levels? - answerElectrons are added to the
lowest level available until it is filled. Then the next level can be used.
Only a certain number of electrons can be found in each level.
Atomic # - answer# of Protons
Atomic Mass - answer(# of Protons) + (# of Neutrons)
# of Neutrons - answer(Atomic Mass) -(Atomic #)
#of Electrons - answer#of Protons (in a neutral atom)
Change the #of Protons, you change the _______ - answerElement
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