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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
Electrons
B
The mass of an atom
C
Protons
D
Neutrons
2) Which part of the atom determines how it will react with other elements?
A
Inner most electrons.
B
Protons in the nucleus
C
Neutrons in the nucleus
D
Valance 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 a large mass and a negative charge.
C
It has no mass but a positive charge.
D
It has mass but no charge.
5) Which part of the atom is MOST important in determining an element's identity?
A
Electrons
B
Protons
C
Valance Electrons
D
Neutrons
6) Which statement is true of the properties of Lithium, Sodium, and Potassium?
A
They are highly reactive.
B
They have no luster.
C
They have low electrical conductivity.
D
They have low heat conductivity.
7) Which of the following is the same for both Nitrogen and Phosphorus?
A
Total mass of neutrons.
B
Number of valence electrons.
C
Number of filled energy levels.
D
Atomic mass
8) Which of the following atoms would have a valence of 2?
A
Na
B
Mg
C
F
D
Ar
9) Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?
A
Potassium and Bromine both have valence electrons in the fourth energy level.
B
Potassium has one valence electron and bromine has seven valence electrons.
C
Potassium and Bromine have the same number of electrons in their highest energy levels.
D
Potassium needs one electron to complete its highest energy level, and bromine has an extra electron.
10) Which of the following could describe an atom with an atomic number of 9?
A
9 protons, 10 neutrons
B
4 protons, 5 neutrons
C
3 protons, 3 neutrons
D
10 protons, 9 neutrons
*select an answer for all questions
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