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Is atomic mass equal the number of protons and neutrons or the weight of the nuclei?
Wiki User
∙ 12y ago
The Atomic Mass number, which is always an integer, is the sum of the numbers of protons and neutrons in the nucleus. This is approximately equal to the mass of in atomic mass units of an atom of a particular isotope, because the only other constituents of an atom are electrons, of which there are the same number as protons but which have only about 0.005 times the mass of either protons or neutrons. There are also small variations in actual atomic masses because of the fact that nuclei have varying degrees of stability to radioactive decay, and this is reflected in their masses because of the equivalence between mass and energy first postulated by Einstein and later proved by many others.
Wiki User
∙ 12y ago
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What does the atomic number on the periodic table tell?
The atomic number represents the number of protons. The atomic mass represents the number of protons + neutrons.
How is an atomic number similar to mass number?
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
What makes up the atoms mass number?
The mass number is the average total of the number of protons and neutrons in the atomic nuclei of all the isotopes of that element on earth. Thus, the average number of neutrons in that element can be found by subtracting the atomic number from the mass number.
What is the nucleus made of?
The nucleus of what? There are all sorts of nuclei including atomic nuclei and cell nuclei. Atomic nuclei are made of protons and neutrons. Cell nuclei are made of lipids, protein, DNA and many other chemicals.
How many neutrons are in the nucleus of a atom?
Atomic nuclei are composed of protons and neutrons. The atomic number of an element shows the number of protons in a nucleus of an atom of that element, while the atomic mass shows the average number of nucleons (either a proton or a neutron) in nuclei of that element. There can be an average because, unlike proton number, neutron number can vary from isotope to isotope. For example, carbon can have 6 or 7 neutrons and still be stable, but it always has to have 6 protons, or else it'd be a different element. Because atomic mass is equal to the number of protons and neutrons, one can find the number of neutrons by subtracting the number of protons from the total number of nucleons in a given isotope. To do this, subtract the atomic number from the atomic mass.
How do the number of neutrons and protons in nuclei of carbon-14 and nitrogen-14 differ?
Carbon is atomic number 6, so its atoms have 6 protons in their nuclei. Carbon-14 atoms have 8 neutrons in addition to the 6 protons. Nitrogen is atomic number 7, so its atoms have 7 protons in their nuclei. Nitrogen-14 atoms have 7 neutrons in addition to the 7 protons.
How are atomic number and atomic mass alike?
Atomic number and atomic mass are not alike. Atomic number is the number of protons in the nuclei of the atoms of an element. Each element has a unique atomic number. Atomic mass is the combined masses of the protons, neutrons, and electrons of the atoms of an element. Individual isotopes of an element have specific mass numbers, which are the sum of the protons and neutrons in the nuclei of the atoms of the isotope.
What are the atomic number and atomic mass number of?
The atomic number of an element is the number of protons in the nuclei of its atoms. Mass number is the sum of protons and neutrons in the atomic nucleus of a particular isotope of an element.
What does the atomic number on the periodic table tell?
The atomic number represents the number of protons. The atomic mass represents the number of protons + neutrons.
How many protons neutrons and electrons does 96 silver have?
The term silver-96 indicates a mass number of 96 for that isotope of silver. The mass number of an isotope is the sum of protons and neutrons in the nuclei of its atoms. On the periodic table, the atomic number for silver is 47. The atomic number of an element is the number of protons in the nuclei of its atoms. The difference between the mass number and atomic number is the number of neutrons in the nuclei of the atoms of that isotope. In a neutral atom, the number of protons and electrons are equal. Therefore, silver-96 has 47 protons and 47 electrons in its atoms. The number of neutrons = 96 - 47 = 49.
How is an atomic number similar to mass number?
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
What is an atomic number and what is a mass number?
Atomic number is the number of protons in the nuclei of the atoms of a given element. The elements on the periodic table are arranged according to increasing atomic number. For example, carbon's atomic number is 6, so it has 6 protons in the nuclei of all of its atoms.Mass number is the number of protons and neutrons in the nuclei of the atoms of a particular isotope of an element. For example, carbon-12 is an isotope of carbon that has 6 protons and 6 neutrons in the nuclei of its atoms. However, carbon-14 is an isotope of carbon that has 6 protons and 8 neutrons in the nuclei of its atoms.
How are atomic mass and atomic number different?
Atomic number is the number of protons in the nuclei of the atoms of an element. Atomic number is unique to each element. Atomic Mass is the combined mass of the protons, neutrons, and electrons in an atom of an element.
What makes up the atoms mass number?
The mass number is the average total of the number of protons and neutrons in the atomic nuclei of all the isotopes of that element on earth. Thus, the average number of neutrons in that element can be found by subtracting the atomic number from the mass number.
Why does the atomic number of an atom differ from the atomic mass?
Because the atomic number indicates the number of protons per nucleus while the mass number is the sum of the number of protons and the number of neutrons per nucleus, and all atoms except hydrogen-1 have neutrons in their nuclei.
What is the nucleus made of?
The nucleus of what? There are all sorts of nuclei including atomic nuclei and cell nuclei. Atomic nuclei are made of protons and neutrons. Cell nuclei are made of lipids, protein, DNA and many other chemicals.
How many neutrons are in the nucleus of a atom?
Atomic nuclei are composed of protons and neutrons. The atomic number of an element shows the number of protons in a nucleus of an atom of that element, while the atomic mass shows the average number of nucleons (either a proton or a neutron) in nuclei of that element. There can be an average because, unlike proton number, neutron number can vary from isotope to isotope. For example, carbon can have 6 or 7 neutrons and still be stable, but it always has to have 6 protons, or else it'd be a different element. Because atomic mass is equal to the number of protons and neutrons, one can find the number of neutrons by subtracting the number of protons from the total number of nucleons in a given isotope. To do this, subtract the atomic number from the atomic mass.
