List the numbers of protons, neutrons, and electrons in Chlorine-18.
the number of protons is the atomic number of an element
... its number in the periodic table
atoms are neutral ... so the number of electrons is the same as protons
elements (atoms) have isotopes
... same number of protons , but different number of neutrons
the 18 after the chlorine is not standard nomenclature
... but it probably indicates the number of neutrons
To determine the numbers of protons, neutrons, and electrons in an atom, we need to understand the structure of the atom.
An atom is composed of a nucleus that contains protons and neutrons, and electrons that orbit around the nucleus. The number of protons determines the element of an atom, while the number of neutrons determines the isotope of that element.
In the case of Chlorine-18, the 18 represents the mass number, which is the sum of the protons and neutrons. Chlorine has an atomic number of 17 on the periodic table, which indicates it has 17 protons.
To find the number of neutrons, subtract the atomic number from the mass number: Mass number - Atomic number = Number of Neutrons
Therefore, for Chlorine-18:
Number of protons = 17
Number of neutrons = 18 - 17 = 1
The number of electrons in an atom is equal to the number of protons in a neutral atom. Since Chlorine has 17 protons, it will have 17 electrons.
In summary:
Number of protons = 17
Number of neutrons = 1
Number of electrons = 17