What is the mass number for a fluorine atom that contains 10 neutrons?
9+10 = ___
19
The mass number of an atom is the sum of its protons and neutrons. Fluorine has an atomic number of 9, which means it has 9 protons. If a fluorine atom contains 10 neutrons, we can calculate its mass number by adding the number of protons (9) and neutrons (10) together.
Mass number = Number of protons + Number of neutrons
Mass number = 9 + 10 = 19
Therefore, the mass number for a fluorine atom that contains 10 neutrons is 19.
To determine the mass number of an atom, we need to know the number of protons and neutrons it has. The mass number is the sum of the protons and neutrons in the atom's nucleus.
In the case of a fluorine atom, the atomic number is 9, which indicates the number of protons in the nucleus since the atomic number represents the number of protons in an atom.
To find the number of neutrons, which is 10 in this case, we subtract the atomic number (number of protons) from the mass number.
Therefore, the mass number of the fluorine atom with 10 neutrons is:
Mass number = Atomic number + Number of neutrons
Mass number = 9 + 10
Mass number = 19
So, the mass number for a fluorine atom with 10 neutrons is 19.