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PS-2.1: Structure Of The Atom
Test Description: Identify subatomic particles, their location in atom,mass,charge; how they determine identity of atom, atomic mass, and reactivity
Instructions: Answer all questions to get your test result.
1) What is an atom?
A
The "core" of matter; it is the center around which solids are built.
B
The smallest piece of matter;it cannot be split into smaller pieces.
C
The smallest piece of matter that still retains the properties of the element.
D
A particle consisting of two smaller parts.
2) The 3 major subatomic particles are
A
positrons, neutrons, and electrons
B
protons, neutrinos and electrons
C
protons, neutrons, and electrons
D
positrons, nutrinos, and electrons
3) Protons
A
have a positive charge and are located in an area outside the nucleus.
B
have a neutral charge and are located in the nucleus
C
have a negative charge and are located in an area outside nucleus
D
have a positive charge and are located in the nucleus of the atom.
4) Neutrons
A
have a neutral charge and are located in the nucleus
B
have a positive charge and are located in the nucleus of the atom.
C
have a positive charge and are located in an area outside the nucleus.
D
have a negative charge and are located in an area outside nucleus
5) Electrons
A
have a negative charge and are located in an area outside nucleus
B
have a positive charge and are located in an area outside the nucleus.
C
have a positive charge and are located in the nucleus of the atom.
D
have a neutral charge and are located in the nucleus
6) Regarding mass,
A
electrons and neutrons have about the same mass: protons are considered to have 0 mass
B
protons and electrons have about the same mass: neutrons are considered to have 0 mass
C
protons, electrons, and neutrons have about the same mass: 1 AMU
D
protons and neutrons have about the same mass: electrons are considered to have 0 mass
7) Regarding particle charge,
A
protons have a - charge; neutrons have a + charge, and electrons have a neutral charge
B
protons have a + charge; neutrons have a neutral charge, and electrons have a - charge
C
protons have a + charge; neutrons have a - charge, and electrons have a neutral charge
D
protons have a + charge; neutrons and electrons have a negativecharge
8) What determines the identity of an atom?
A
the number of neutrons (atomic number)
B
total number of protons and neutrons
C
number of energy levels
D
the number of protons (atomic number)
9) What determines how an atom reacts with other atoms?
A
number of neutrons in the nucleus
B
number of protons in the outer energy level
C
number of electrons in the nucleus
D
number of electrons in the outer energy level
10) As the number of electrons increases,
A
the number of occupied energy levels and the volume of the atom increase
B
the number of protons and the volume of the atom decrease,
C
the number of neutrons and the volume of the atom increase
D
the number of occupied energy levels increase, and the volume of the atom decreases.
*select an answer for all questions
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