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20 questions
What is the mass number for Copper?
63
29
34
92
How many electrons does Cu4+ have?
29
33
25
30
What does the mass number tell you?
The number of electrons and protons
The number of neutrons
The number of protons and neutrons
The number of protons.
What is the mass number of Neon?
10
20.18
10.18
20
Who discovered that the atom had an small, dense, positively charged center?
Ernest Rutherford
J.J Thomson
Robert Millikan
John Dalton
This model this model was the first to show a positive nucleus. Electrons outside of the nucleus.
The "Rutherford Model" of the atom
The "Plum Pudding Model" of the atom
The "Quantum Mechanical Modell" of the atom
Democritus's model of the atom
This was the first model of the atom ever proposed.
Democritus's model of the atom
The "Plum Pudding Model" of the atom
The "Rutherford Model" of the atom
The "Quantum Mechanical Model" of the atom
In the atomic model nicknamed the "plum pudding" model, or "chocolate chip cookie model", what do the plums or chocolate chips represent?
the nucleus
the atom
the electrons
the positive material
This model of the atom was developed to explain emission line spectra of elements.
Dalton's model of the atom
Rutherford's model of the atom
Bohr's model of the atom
Thomson's model of the atom
What is the number of neutrons in this atom?
6
12
12.011
Cannot be determined
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