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Atomic Structure
Test Description: Questions are based on Texas 8th grade science objectives.
Instructions: Answer all questions to get your test result.
1) Which of these is NOT found in the nucleus of an atom?
A
Neutrons
B
The mass of an atom
C
Electrons
D
Protons
2) Which part of the atom determines how it will react with other elements?
A
Valance electrons
B
Protons in the nucleus
C
Neutrons in the nucleus
D
Inner most electrons.
3) Which of the following statements are incorrect on how the mass of a single neutron, proton, and electron relate to each other?
A
The mass of a neutron is greater than the mass of an electron.
B
The mass of an electron is less than the mass of a proton.
C
The mass of an electron equals the mass of a proton.
D
The mass of the neutrons equals the mass of a proton.
4) Which of the following best describes one of the subatomic particles that could be found within the nucleus?
A
It has no mass and an equal number of positive and negative charges.
B
It has no mass but a positive charge.
C
It has a large mass and a negative charge.
D
It has mass but no charge.
5) Which part of the atom is MOST important in determining an element's identity?
A
Neutrons
B
Electrons
C
Protons
D
Valance Electrons
6) Which statement is true of the properties of Lithium, Sodium, and Potassium?
A
They have no luster.
B
They have low heat conductivity.
C
They are highly reactive.
D
They have low electrical conductivity.
7) Which of the following is the same for both Nitrogen and Phosphorus?
A
Number of valence electrons.
B
Number of filled energy levels.
C
Total mass of neutrons.
D
Atomic mass
8) Which of the following atoms would have a valence of 2?
A
F
B
Ar
C
Mg
D
Na
9) Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?
A
Potassium and Bromine have the same number of electrons in their highest energy levels.
B
Potassium needs one electron to complete its highest energy level, and bromine has an extra electron.
C
Potassium and Bromine both have valence electrons in the fourth energy level.
D
Potassium has one valence electron and bromine has seven valence electrons.
10) Which of the following could describe an atom with an atomic number of 9?
A
4 protons, 5 neutrons
B
3 protons, 3 neutrons
C
10 protons, 9 neutrons
D
9 protons, 10 neutrons
*select an answer for all questions
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