Want this question answered?
Mass number = No. of protons + No. of neutrons = 19 + 20 = 39
Chlorine has the atomic number of 17. To keep it neutral then, it must have 17 protons and 17 electrons. Chlorine's most common isotope is 35Cl. That means it has 35 - 17 = 18 neutrons.
The isotope Chlorine-37 (or denoted as 37Cl) has 20 neutrons per atom. 37 is the mass number (sum of number of neutrons and protons per atom) and we know that the atomic number for Cl irregardless of whichever isotope is 17, which means all Cl atoms have 17 protons. Therefore the number of neutrons for Chlorine-37 is 37 - 17 = 20.
An isotope of an element has a specific number of neutrons. (Calculated as the mass number minus the atomic number) Most elements have more than one isotope, for example Cl with 17 protons has three naturally occurring isotopes in nature, chlorine-35, with 18 neutrons and chlorine 37 with 20 neutrons along with a trace of chlorine-36 with 19 neutrons.
Boron has 5 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a boron isotope = Mass number - 5
Chlorine has 17 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a chlorine isotope = Mass number - 17
Mass number = No. of protons + No. of neutrons = 19 + 20 = 39
Sodium has 11 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a sodium isotope = Mass number - 11
Chlorine has the atomic number of 17. To keep it neutral then, it must have 17 protons and 17 electrons. Chlorine's most common isotope is 35Cl. That means it has 35 - 17 = 18 neutrons.
The isotope Chlorine-37 (or denoted as 37Cl) has 20 neutrons per atom. 37 is the mass number (sum of number of neutrons and protons per atom) and we know that the atomic number for Cl irregardless of whichever isotope is 17, which means all Cl atoms have 17 protons. Therefore the number of neutrons for Chlorine-37 is 37 - 17 = 20.
An isotope of an element has a specific number of neutrons. (Calculated as the mass number minus the atomic number) Most elements have more than one isotope, for example Cl with 17 protons has three naturally occurring isotopes in nature, chlorine-35, with 18 neutrons and chlorine 37 with 20 neutrons along with a trace of chlorine-36 with 19 neutrons.
Chlorine atoms always have 17 protons. The number of neutrons equals the mass number of the isotope named minus the number of protons: in this instance, 35 - 17 or 18.
oxygen has 8 protons as its atomic number is 8. The number of neutrons depends on the isotope. O-15 isotope will have 7 neutrons, O-16 isotope will have 8 neutrons. (Note: Mass number = Number of protons + number of neutrons)
The C-12 isotope has 6 protons and 6 neutrons.
17 plus 17 equals 34. However, Chlorine-34 does not exist; the stable isotopes are Chlorine-35 and Chlorine-37.
Chlorine atom has 17 protons and 17 electrons. The number of neutrons depends on the isotope considered. Chlorine has four isotopes: Cl-35, Cl-36, Cl-37 and Cl-38 with 18, 19, 20 and 21 neutrons respectively. However out of these, Cl-35 and Cl-37 are the most stable isotopes.
Boron has 5 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a boron isotope = Mass number - 5