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4.3. Distinguishing Between Atoms Questions and Answers 2024
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4.3. Distinguishing Between Atoms
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4.3. Distinguishing Between AtomsThe number of ___ in the nucleus of an atom is the atomic ___ of that element - answer
Protons, Number
Because atoms are electrically neutral, the number of protons and ___ in an atom are
equal - answer Electrons
The total number of ___ and neutrons in an atom is the mass number - answer Protons
Atoms of the same element are identical in most respects, but they can differ in the
number of ___ in the nucleus - answer Neutrons
Atoms that have the same number of protons but different mass numbers are called -
answer Isotopes
The ___ of an element is the weighted average of the masses of the isotopes of that
element - answer Atomic mass
The ___ of an element is the weighted average of the masses of the idol toes of that
element - answer Atomic mass
Each of the three known isotopes of hydrogen has ___ proton(s) in the nucleus -
answer1
The most common hydrogen isotope has ___ neutrons - answerNo
The most common hydrogen isotope has a mass number of ___ and is called hydrogen-
1 - answer1
The atomic number of an element is the sum of the protons and electrons in an atom of
that element - answerNever True
The atomic number of an atom is the total number of protons in an atom of that element
- answerAlways True
An atom of nitrogen has 7 protons and 7 neutrons - answerSometimes True
Relative atomic masses are expressed in amus - answerAlways True
The number of neutrons in the nucleus can be calculated by subtracting the atomic
number from the mass number - answerAlways True
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