객관식
How many neutrons are present in a neutral atom of fluorine (F) with atomic number 9 and mass number 19?
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2. Atoms & Elements
The Atom
객관식
An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for this atom?
A
^{52}_{29}V
B
^{52}_{23}Na
C
^{52}_{23}V
D
^{52}_{29}Cu
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검증된 단계별 안내1
Identify the number of protons in the atom, which determines the atomic number (Z). Here, the atom has 23 protons, so Z = 23.
Determine the number of neutrons, which is given as 29. The mass number (A) is the sum of protons and neutrons: \(A = Z + \text{neutrons} = 23 + 29\).
Calculate the mass number \(A\) using the values from step 2, which will be used as the superscript in the chemical symbol.
Use the atomic number \(Z = 23\) to identify the element on the periodic table. The element with atomic number 23 is Vanadium (V).
Write the chemical symbol in the form \(^{A}_{Z}X\), where \(A\) is the mass number, \(Z\) is the atomic number, and \(X\) is the element symbol. For this atom, it will be \(^{52}_{23}V\).
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