2. Atoms & Elements

Isotopes

미해결 질문
How many protons, neutrons, and electrons make up an atom of nitrogen-15?
977
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객관식
Which of the following answers give the correct number of subatomic particles for ?
4826
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31
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객관식
An isotope of titanium is represented as 48Ti. How many protons does this isotope of titanium have?
145
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객관식
Which of the following best describes an isotope?
152
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객관식
An alpha particle is also referred to as the nucleus of which isotope?
106
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객관식
If the natural abundance of Br-79 is 50.69%, what is the natural abundance of Br-81?
115
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객관식
Which isotope of argon has 22 neutrons?
131
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객관식
Which of the following is the correct isotope symbol for an atom containing 20 protons and 22 neutrons?
123
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객관식
Two atoms that are isotopes of one another must have a different number of which subatomic particle?
134
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객관식
An atom has an atomic number of 25 and a mass number of 55. How many neutrons are present in its nucleus?
110
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객관식
Which of the following correctly represents the isotope of carbon with 6 protons and 8 neutrons in isotope notation?
113
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객관식
How many neutrons are present in the nucleus of a germanium (Ge) atom with a mass number of 73?
157
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객관식
Can two atoms with the same mass number ever be isotopes of each other?
178
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객관식
Which of the following factors directly affects the average atomic mass of an element that exists as a mixture of isotopes?
124
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객관식
A lithium atom has an atomic number of 3 and a mass number of 7. How many neutrons are in this lithium atom?
713
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