QuestionFind the neutrons, protons, and electrons for a Se ion with mass number 78 and charge -2.
Studdy Solution
STEP 1
Assumptions1. The ion is a Se (elenium) ion.
. The mass number of the ion is78.
3. The charge of the ion is -.
4. The mass number is the sum of the number of protons and neutrons.
5. The charge of the ion is the difference between the number of protons and electrons.
STEP 2
First, we need to find the atomic number of Selenium (Se). The atomic number represents the number of protons in an atom or ion. We can find this information in the periodic table.
The atomic number of Selenium (Se) is34.
STEP 3
Now that we know the atomic number, we can determine the number of protons in the Se ion. The number of protons is equal to the atomic number.
STEP 4
Plug in the atomic number of Selenium (Se) to calculate the number of protons.
STEP 5
Next, we need to find the number of neutrons in the Se ion. We can do this by subtracting the number of protons from the mass number.
STEP 6
Plug in the given mass number and the calculated number of protons to calculate the number of neutrons.
STEP 7
Calculate the number of neutrons.
STEP 8
Finally, we need to find the number of electrons in the Se ion. We can do this by adding the charge of the ion to the number of protons.
STEP 9
Plug in the calculated number of protons and the given charge of the ion to calculate the number of electrons.
STEP 10
Calculate the number of electrons.
The Se ion has44 neutrons,34 protons, and32 electrons.
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