No, electrons only make a negligible contribution to atomic weight. On the Periodic Table the atomic weight listed for most of the elements is the average of that element's isotopes.
Chlorine has 2 common isotopes: Chlorine-35 (75.77% of all chlorine) and chlorine-37 (24.23%) This works out to an average mass of about 35.5.
The atomic weight for each element on the periodic table represents a weighted average of the masses of all naturally occurring isotopes of an element. Because of this, the elements do not have whole-number atomic weights. An exception is the atomic weight for some elements written inside parentheses. These elements do not have stable isotopes and the atomic weight listed is the atomic weight for the longest lived isotope.
It has an atomic mass of 35.4527
The atomic weight (not mass) of chlorine is now [35,446; 35,457]. I don't understand "no chlorine with mass exist in nature".
The atomic weight of scandium chloride (ScCl3) is calculated by adding the atomic weight of scandium (Sc) to three times the atomic weight of chlorine (Cl). The atomic weight of scandium is approximately 44.96 g/mol, and the atomic weight of chlorine is approximately 35.45 g/mol. Therefore, the atomic weight of ScCl3 is approximately 150.31 g/mol.
It is not. It is 35.453. On the periodic table, the atomic weight listed for most of the elements is the average of that element's isotopes. Chlorine has 2 common isotopes: Chlorine-35 (75.77% of all chlorine) and chlorine-37 (24.23%). This has two extra neutrons. This works out to an average of about 35.5 or what is stated in the question.
The atomic weight of Br (Bromine) is the sum of the atomic weights of Cl (Chlorine) and I (Iodine). This is because bromine falls between chlorine and iodine in the periodic table, thus its atomic weight is approximately the average of the atomic weights of chlorine and iodine.
The element with an atomic weight of 35.453 is chlorine (Cl).
The atomic weight for each element on the periodic table represents a weighted average of the masses of all naturally occurring isotopes of an element. Because of this, the elements do not have whole-number atomic weights. An exception is the atomic weight for some elements written inside parentheses. These elements do not have stable isotopes and the atomic weight listed is the atomic weight for the longest lived isotope.
all elements have an atomic weight, because all of them have electrons and protons, and every electron and proton have a weight.
the equivalent weight of chlorine is 35.453, which is also it's atomic weight.
Florine has a greater Atomic Weight because Carbon has a Atomic Weight of 12 amu (atomic mass units) while Florine has a Atomic Weight of 19.
It has an atomic mass of 35.4527
The atomic weight (not mass) of chlorine is now [35,446; 35,457]. I don't understand "no chlorine with mass exist in nature".
35.453 ------------- The relative atomic weight (not mass) of chlorine is after IUPAC tables from 2009 [35,446; 35,457]; the conventional value is 35,45.
The atomic weight of scandium chloride (ScCl3) is calculated by adding the atomic weight of scandium (Sc) to three times the atomic weight of chlorine (Cl). The atomic weight of scandium is approximately 44.96 g/mol, and the atomic weight of chlorine is approximately 35.45 g/mol. Therefore, the atomic weight of ScCl3 is approximately 150.31 g/mol.
It is not. It is 35.453. On the periodic table, the atomic weight listed for most of the elements is the average of that element's isotopes. Chlorine has 2 common isotopes: Chlorine-35 (75.77% of all chlorine) and chlorine-37 (24.23%). This has two extra neutrons. This works out to an average of about 35.5 or what is stated in the question.
The atomic weight of chlorine is 35,45.The atomic weight of chlorine is approximately 35.5 g/mol. An addition of electron is a negligible weight difference. Therefore, the mass is considered to remain the same at 35.5 grams per mole.