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Atomic Structure
Test Description: Parts of an atom
Instructions: Answer all questions to get your test result.
1) Ca-20, Ca -21 and Ca-22 have the same number of....
A
neutrons, different electrons
B
protons, different neutrons
C
protons, different electrons
D
neutrons, different protons
2) If the average atomic mass for Oxygen is 15.9995amu, is there more O-15 or O-16 isotopes that occur naturally?
A
O-15
B
Both are in equal amounts
C
O-16
D
None of the above
3) Same number of protons and different number of neutrons is best described as a(n)...
A
Mass Number
B
Ion
C
Isotope
D
Charge
4) Same number of protons and different number of electrons is best described as a(n)...
A
Charge
B
Ion
C
Mass number
D
Isotope
5) What two atomic particles have a mass and where are they located?
A
Protons and neutrons, nucleus
B
Protons and Electrons, nucleus and in the outer rings
C
Electrons and neutron, located in nucleus
D
Protons and neutrons, located in outer rings
6) If the atom is stable, that means that there are equal numbers of what subatomic particles?
A
Neutrons and Electrons
B
protons and neutrons
C
Protons and electrons
D
Only electrons
7) The atomic number is the same as...
A
number of protons
B
the mass number
C
number of neutrons
D
the charge
8) A Magnesium ion consists of 12 protons, 16 neutrons and 10 electrons. What is the charge on the ion?
A
4+
B
2-
C
4-
D
2+
9) A neutral atom of oxygen has atomic number 8 and mass number 18. It has
A
10 protons, 8 electrons and 6 neutrons
B
8 protons, 8 electrons and 10 neutrons
C
8 protons, 6 electrons and 6 neutrons
D
10 protons, 8 electrons and 8 neutrons
10) Who discovered that protons and neutrons form the nucleus?
A
JJ Thomson
B
John Dalton
C
Ernest Rutherford
D
Robert Millikan
11) Which element has more electrons? Mg 2- or Al 2+
A
They are the same
B
Al 2+
C
Mg 2-
D
No way to tell
12) An ion with a negative charge is a(n)
A
Isotope
B
Cation
C
Anion
D
Ion
13) What is the mass number for iron if it's atomic number is 26, it has 28 electrons and 20 neutrons?
A
54
B
46
C
8
D
10
14) Who came up with the theory that atoms cannot be created or destroyed and simply change form?
A
Ernest Rutherford
B
JJ Thomson
C
Robert Milikan
D
John Dalton
*select an answer for all questions
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