Table of Contents
- 1 Why is relative atomic mass of some elements not a whole number?
- 2 What is relative atomic mass of chlorine?
- 3 What is the reason for fractional atomic masses?
- 4 What is the difference between relative atomic mass and average atomic mass?
- 5 Why is the relative atomic mass of chlorine not 35?
- 6 What is the number of protons and electrons in chlorine?
Why is relative atomic mass of some elements not a whole number?
The relative atomic mass of an element is a weighted average of the masses of the atoms of the isotopes. It takes account of the abundance of each of the isotopes of the element. relative atomic masses are often rounded to the nearest whole number, but are actually not whole numbers.
Why is the atomic mass of chlorine is a fractional number?
It has atomic number 17, chlorine have fractional atomic mass number because it has two isotopes having atomic mass number 35 and 37 in the ratio 3:1. This is because the atomic weight used in the periodic table and calculations is the average mass of its isotopes whose atomic masses are 34 and 35.
What is relative atomic mass of chlorine?
35.453 u
Chlorine/Atomic mass
Why atomic mass number is a whole number?
Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom.
What is the reason for fractional atomic masses?
Reason for fractional atomic mass: The atomic masses of most elements are fractional because they exist as a mixture of isotopes of different masses. Since the atomic mass of isotopes are different, so average atomic mass is calculated for a single element.
What is the difference between relative atomic mass and atomic mass?
The main difference between relative atomic mass and atomic mass is that relative atomic mass is the ratio of the average mass of atoms of an element to one twelfth of the mass of carbon-12 whereas atomic mass is the total mass of nucleons present in the nucleus of an atom.
What is the difference between relative atomic mass and average atomic mass?
Relative and average atomic mass both describe properties of an element related to its different isotopes. However, relative atomic mass is a standardized number that’s assumed to be correct under most circumstances, while average atomic mass is only true for a specific sample.
What is the reason for fractional atomic masses mass No of elements explain with example?
The atomic mass of most elements are fractional because they exist as a mixture of isotopes of different masses. Most elements occur as a mixture of isotopes of different masses. The fractional atomic masses arise because of this mixture.
Why is the relative atomic mass of chlorine not 35?
Explain why the relative atomic mass of chlorine is not a whole number? The answer to why chlorine has an atomic weight of 35.5 not 35 is because of something called isotopes. Chlorine-35 has 17 protons and 18 neutrons and occurs in nature about 75\% of the time.
How do you calculate the atomic weight of chlorine?
The atomic weight, or as it is properly called, the RELATIVE atomic mass, is a weighted average of the masses of all the isotopes of chlorine. Relative Atomic Mass = ( 75 100 ×35) + ( 25 100 × 37) = 35.5
What is the number of protons and electrons in chlorine?
This means that they have the same number of protons and electrons but a different number of neutrons. Chlorine is roughly 75\% Cl 35 and 25\% Cl 37 . The mass number is calculated as a weighted mean of the mass of the stable isotopes.
Which compound of copper and chlorine has the lowest atomic mass?
The compound of copper and chlorine with the lowest atomic ratio of copper to chlorine is CuCl2. Why is chlorines atomic mass not a whole number? Chlorines atomic mass isn’t a whole number because it is an average.