c. What is meant by atomic mass
number ? Explain how the atomic
number and mass number of carbon are
6 and 12 respectively.
Answers
Answer:
The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. ... The mass number is different for each different isotope of a chemical element.
Since the mass of electrons are negligible, the mass of an element is often taken as the sum of number of protons and neutrons. ... Carbon has 6 protons, 6 electrons and 6 neutrons. So the atomic number is 6 as the number of protons is 6. The mass number is 12 as the sum of protons and neutrons is 12.
Explanation:
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Answer:
The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. ... The mass number is different for each different isotope of a chemical element.
Atomic number of an element refers to the number of electrons or protons present in that element. It is denoted by Z.
Mass number refers to the total mass of the element. Since the mass of electrons are negligible, the mass of an element is often taken as the sum of number of protons and neutrons. It is denoted by letter A.
Carbon has 6 protons, 6 electrons and 6 neutrons. So the atomic number is 6 as the number of protons is 6. The mass number is 12 as the sum of protons and neutrons is 12.
Mass Number = 6 protons + 6 neutrons = 12
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