2. Atoms & Elements

Subatomic Particles

Multiple Choice
Which subatomic particle is the smallest in terms of mass?
Open Question
What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?
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Multiple Choice
A Se ion has a mass number of 75 and a charge of -2. Determine the number of neutrons, protons, and electrons in this ion.
Open Question
If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is
Open Question
What is the atomic mass number of carbon-13 (6 protons, 7 neutrons, 6 electrons)?
Open Question
Sodium's atomic number is 11. What does this tell you about an atom of sodium?
Open Question
Consider the following table showing symbols, the number of protons, electrons, and neutrons, and the mass number. Each column represents a neutral atom.
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Fill in the third column of this table.
Multiple Choice
Which of the following is an example of a subatomic particle?
Open Question
How many protons, neutrons, and electrons are there in a neutral atom of ⁹⁷Tc (Technetium-97)?
Open Question
An uncharged atom has six electrons. the nucleus of this atom must contain _______ protons.
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Multiple Choice
In a typical atomic diagram, orange circles are often used to represent which subatomic particles?
Multiple Choice
Which of the following lists includes all three main subatomic particles found in atoms?
Multiple Choice
Which of the following correctly identifies both the number and location of protons in a lithium (Li) atom?
Multiple Choice
Which two subatomic particles each have a mass of approximately one atomic mass unit?
Multiple Choice
Which subatomic particle has the smallest mass?