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What is an isotope?

What did Rutherford conclude about the atom as a result of his Gold Foil experiment?

atomic structure

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1
What did Rutherford conclude about the atom as a result of his Gold Foil experiment?
Electrons float in a positively charged substance.
The atom is composed of mainly empty space.
Protons are positively charged.
The atom is a densely packed substance.
2
What is an isotope?
Different # of protons than original
Different # of electrons than original
Different atomic mass than original
More atomic rings than original
3
What is an isotope?
the # of Harrison's is different than the # of DJ Caleb's
atom where the number of neutrons is different from protons
Atom where number of protons is different from protons
Atom where the number of electrons is different from protons
4
In what year did John Dalton first produce his ideas on atomic structure?
1893
1703
1793
1803
5
Who's theory of atomic structure is sometimes called the "nuclear" model?
J. J. Thompson
Ernest Rutherford
Niels Bohr
John Dalton
6
The majority of the mass of an atom comes from which subatomic particle(s)?
Protons
Protons + Electrons
Neutrons + Electrons
Neutrons + Protons
7
Which of these is NOT an ion?
Cu2+
816O+
O2-
O2 (g)
8
What is the Atomic Number
137.327
80
56
136