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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
The mass of an atom
B
Protons
C
Neutrons
D
Electrons
2) Which part of the atom determines how it will react with other elements?
A
Valance electrons
B
Neutrons in the nucleus
C
Protons 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 the neutrons equals the mass of a proton.
B
The mass of an electron equals the mass of a proton.
C
The mass of a neutron is greater than the mass of an electron.
D
The mass of an electron is less than 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 mass but no charge.
B
It has a large mass and a negative charge.
C
It has no mass and an equal number of positive and negative charges.
D
It has no mass but a positive charge.
5) Which part of the atom is MOST important in determining an element's identity?
A
Electrons
B
Neutrons
C
Valance Electrons
D
Protons
6) Which statement is true of the properties of Lithium, Sodium, and Potassium?
A
They have low electrical conductivity.
B
They have no luster.
C
They are highly reactive.
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
Atomic mass
C
Number of valence electrons.
D
Number of filled energy levels.
8) Which of the following atoms would have a valence of 2?
A
Mg
B
Ar
C
F
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
9 protons, 10 neutrons
B
10 protons, 9 neutrons
C
3 protons, 3 neutrons
D
4 protons, 5 neutrons
*select an answer for all questions
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