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Because they have deference number of neutrons

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Why can chlorine molecules have three different values of mass number?

Chlorine (Cl) can have three different values of mass number (isotopes) because it has multiple stable isotopes with different numbers of neutrons. The three isotopes of chlorine are chlorine-35, chlorine-36, and chlorine-37, corresponding to different numbers of neutrons in the nucleus.


What same mass numbers do isotopes have?

Mass numbers of isotopes are different.


Where does the atomic mass of chlorine come from?

The atomic mass of chlorine is calculated based on the average mass of all the naturally occurring isotopes of chlorine and their relative abundance in nature. Isotopes are atoms of the same element with different numbers of neutrons in their nucleus, which affects their atomic mass. The average atomic mass of chlorine is approximately 35.45 atomic mass units.


Why does chlorine have fractional atomic mass?

Chlorine naturally occurs with mixed isotopes, and the number is an average of the atomic mass of those isotopes, in the proportion they are present. The isotopes have the same atomic number (protons), but their mass number can be different due to the presence of a different number of neutrons. These atoms of an element having a different number of neutrons are called isotopes.


What does isotopes have to do with mass numbers?

isotopes of the same element have different mass number


Why does bromine have different mass numbers?

Different isotopes of bromine have different numbers of neutrons, resulting in different mass numbers. Bromine-79 and bromine-81 are the two most common isotopes of bromine, with mass numbers of 79 and 81, respectively.


What is the mass number in chlorine?

Chlorine has isotopes with mass numbers ranging from 32 to 40.


What are the atoms called then they have the same atomic number but different mass numbers?

They are called as isotopes in which mass number differ by emmision of radiation


When atoms of the same element have different mass numbers they are known as?

isotopes


How are isotopes shown?

Isotope can be referred to as the different versions of the SAME ELEMENT. Such as Chlorine has isotopes of Chlorine - 35 and Chlorine - 37. This will just cause the difference in mass numbers because of the difference in neutrons. Chlorine -35 has 17 protons, 17 electrons and 18 neutrons making it to have a mass number of 35 and Chlorine - 37 has 17 protons, 17 electrons and 19 neutrons making it to have a mass number of 39. Some isotopes can be used in normal chemical reactions but some cannot.


What Have different isotopes of the same element?

Isotopes of the same element have different numbers of neutrons and mass.


Atomic mass of Cl?

The relative atomic mass of chlorine is 35.5. The two main isotopes are chlorine-35 and chlorine-37.