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www.chemicalelements.com/elements/cl.html

Name: Chlorine Symbol: Cl Atomic Number: 17 Atomic Mass: 35.4527 amu Melting Point:-100.98 °C (172.17 K, -149.764 °F) Boiling Point:-34.6 °C (238.55 K, -30.279997 °F) Number of Protons/Electrons: 17 Number of Neutrons: 18 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 3.214 g/cm 3 Color: green Atomic Structure

en.wikipedia.org/wiki/Chlorine

Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron ...

www.nuclear-power.net/chlorine-atomic-number-mass-density

Atomic Number of Chlorine. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Chlorine is Cl.. Atomic Mass of Chlorine. Atomic mass of Chlorine is 35.453 u. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and ...

en.wikipedia.org/wiki/Isotopes_of_chlorine

Chlorine (17 Cl) has 25 isotopes with mass numbers ranging from 28 Cl to 52 Cl and 2 isomers (34m Cl and 38m Cl). There are two stable isotopes, 35 Cl (75.77%) and 37 Cl (24.23%), giving chlorine a standard atomic weight of 35.45. The longest-lived radioactive isotope is 36 Cl, which has a half-life of 301,000 years. All other isotopes have half-lives under 1 hour, many less than one second.

study.com/academy/answer/what-is-the-atomic-mass-of-chlorine.html

The atomic mass of chlorine is 35. Chlorine has 17 protons (which we can tell by looking at the atomic number) and 18 neutrons, which add up to give...

www.ciaaw.org/chlorine.htm

Since 1985, relative isotope-ratio mass spectrometry has yielded abundant evidence for variability in the atomic weight of chlorine in both natural and artificial substances, which resulted in the 1999 decision to increase the uncertainty and remove a significant figure from the atomic weight of chlorine, and to introduce the interval notation ...

hobart.k12.in.us/ksms/PeriodicTable/chlorine.htm

Name: Chlorine: Symbol: Cl Atomic Number: 17: Atomic Mass: 35.453 atomic mass units: Number of Protons: 17: Number of Neutrons: 18: Number of Electrons: 17: Melting Point

answers.yahoo.com/question/index?qid=20091115115450AAEQQY1

Go with the amount of sig figs, so... 5 sig figs = 35.453. 4 sig figs = 35.45. 3 sig figs = 35.5. 2 sig figs = 35. 1 sig fig = 40

simple.wikipedia.org/wiki/Atomic_mass

Each isotope has its own atomic mass, called its isotopic mass. In the case of chlorine, chlorine-35 has a mass of around 35 u, and chlorine-37 around 37 u. As mentioned above, note that the atomic mass of an atom is not the same as its mass number.

www.answers.com/Q/There_are_two_principal_stable_isotopes_of_chlorine_-_35cl...

"There are two principal stable isotopes of chlorine - 35Cl and 37Cl. The relative atomic mass of chlorine is 35.5. Explain what this shows about the abundance of the two isotopes.