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Atoms
Test Description: Atomic Structure - parts of an atom and characteristics of an atom
Instructions: Answer all questions to get your test result.
1) What type of subatomic particle is found in a cloud surrounding the nucleus of an atom.
A
Neutral in charge with mass
B
Negative in charge with no mass
C
Neutral in charge with no mass
D
Negative in charge with mass
2) Which of the following describes a proton?
A
Positive in charge with no mass outside the nucleus
B
Positive charge with mass inside the nucleus
C
Positive in charge with mass outside the nucleus
D
Positive in charge with no mass inside the nucleus
3) What part of the atom identifies it as an element?
A
The number of protons
B
The number of electrons
C
The mass of the atom
D
The atomic number
4) What is the mass of an atom with 24 protons and 34 neutrons?
A
24
B
10
C
34
D
58
5) What is the total number of protons, neutrons, and electrons in an atom of Calcium, Ca with an atomic mass of 42?
A
42
B
22
C
62
D
124
6) How many protons, neutrons, electrons are found in an atom of Bromine, Br, with a mass of 80?
A
35 protons, 45 neutrons, 35 electrons
B
35 protons, 80 neutrons, 35 electrons
C
35 protons, 35 neutrons, 35 electrons
D
80 protons, 35 neutrons, 80 electrons
7) What is the difference between the number of electrons in an atom of Arsenic, As and the number of electrons in an atom of Aluminum
A
20
B
46
C
13
D
33
8) An atom of a certain element has 12 protons, 12 electrons, and a mass of 24. How many neutrons are in this atom?
A
10
B
24
C
36
D
12
9) Which of the following describes a neutron?
A
Neutral with no mass outside the nucleus
B
Negative charge with mass in the nucleus
C
Negative charge with no mass in the nucleus
D
Neutral charge with mass inside the nucleus
10) Which property of the unknown element determines the other elements it reacts with?
A
The number of valence electrons in the unknown element
B
The total number of neutrons in the unknown element
C
The total number of particles in the nucleus of the unknown element
D
The number of protons in the nucleus in the unknown element
*select an answer for all questions
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