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The mass of selenium is approximately 78.96 atomic mass units. The atomic number of selenium is 34.
Selenium's mass number is 79. It is the sum of the number of protons and neutrons in the nucleus of a selenium atom.
78.96amu
The atomic number of selenium is 38 and its mass number is 78.96
The mass number of an atom is the sum of its protons and neutrons. Since selenium usually has 34 neutrons, an atom of selenium with 31 neutrons would have a mass number of 34 (31 neutrons + 17 protons).
The mass of selenium is approximately 78.96 atomic mass units. The atomic number of selenium is 34.
Selenium's mass number is 79. It is the sum of the number of protons and neutrons in the nucleus of a selenium atom.
78.96amu
The atomic number of selenium is 38 and its mass number is 78.96
78.96
A simply formula is the atomic mass of selenium (rounded to the whole number) - atomic number = neutrons. So Selenium 76 has 45 neutrons.
Selenium
The mass number of an atom is the sum of its protons and neutrons. Since selenium usually has 34 neutrons, an atom of selenium with 31 neutrons would have a mass number of 34 (31 neutrons + 17 protons).
To convert grams of selenium (Se) to moles, divide the given mass by the molar mass of selenium. The molar mass of selenium is approximately 78.97 g/mol. ( \dfrac{2.76 : g}{78.97 : g/mol} = 0.035 : mol : Se)
Selenium
This is isotope selenium-77.
1.9 mol Se ( 78.96 grams/1mol Se ) = 150.024 grams