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The Nucleus PS511 And The Electron Cloud PS512
Test Description: Answer the questions and fill out the study guide.
Instructions: Answer all questions to get your test result.
1) Does the nucleus of an atom have a positive or negative charge?
A
The nucleus contains electrons, so it has a negative charge.
B
The nucleus contains protons, so it have a negative charge.
C
The nucleus contains the neutrons, so it has a neutral charge.
D
The nucleus contains protons, so it has a positive charge..
2) Which count of subatomic particles gives an atom its unique identity as an element, and represents its atomic number?
A
The number of electrons
B
The number of neutrons plus the number of protons
C
The number of protons
D
The number of neutrons
3) Choose the true statement concerning the mass of subatomic particles.
A
Protons and neutrons have about the same mass
B
All subatomic particles have about the same mass
C
Electrons are more massive than protons.
D
Electrons are more massive than neutrons.
4) Which subatomic particle (or particles) exist in an atom's nucleus?
A
Neutrons only
B
Protons, neutrons, and electrons
C
Protons only
D
Protons and neutrons only
5) Which subatomic particle adds atomic mass to an atom but without adding charge?
A
proton
B
neutron
C
electron
D
ion
6) What is the maximum number of electrons in the first electron shell, closest to the nucleus?
A
4
B
8
C
2
D
1
7) Which subatomic particle is responsible for chemical properties of atoms?
A
neutrons
B
protons
C
neutrons and protons
D
electrons
8) A neutral charge by an atom is caused by which of the following conditions?
A
the balance of electrons in each electron shell
B
balance in number of protons and neutrons
C
balance in number of electrons and protons
D
presence of neutrons in the nucleus
9) Neon has 10 protons and 10 electrons. How many additional electrons would it take to fill the outer (second) electron shell?
A
0
B
6
C
1
D
2
10) Calcium has 20 electrons. How many electrons are in the outer shell?
A
0
B
6
C
8
D
2
*select an answer for all questions
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