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The sum of the number of protons and neutrons in the atomic nucleus is called the atomic mass number.
*Related Information:
One element may exist as a mixture of atoms with different numbers of neutrons. This is in contrast with, and often confused with, the atomic mass (as such, without number). This is the average mass of all naturally occurringatoms of a particular element.
Example:
Naturally occurring chlorine, atomic number 17, has 17 protons but can have either 18 (75%) or 20 (25%) neutrons in its nucleus as well. The Atomic Mass numbers of these two isotopes are 35 or 37 respectively. The atomic mass of the element chlorine is 35.45 a.m.u.
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In what way do these atoms corresponds and in what way do they differin terms of their mass numbers?
Atoms correspond in that they are all made up of protons, neutrons, and electrons. However, they differ in their mass numbers, which is the sum of protons and neutrons. Atoms of different elements have different mass numbers due to varying numbers of protons and neutrons.
The mass number of an atom indicates the number of what?
The mass number is the sum of protons + neutrons.
How many protons nuetrons and electrons does argon have?
In order to answer this question, the specific isotope of argon must be known. However, I will answer it using argon-40 because it makes up over 99% of the atoms of argon. Argon-40 has a mass number of 40, meaning that the sum of protons and neutrons in the nuclei of its atoms is 40. In order to use this information to determine the numbers of protons and neutrons, you also need to know the atomic number, which is the number of protons in the nucleus of its atoms. Argon's atomic number is 18, so we know that all argon atoms have 18 protons. To calculate the number of neutrons, we subtract the atomic number from the mass number, which is (40-18)=22 neutrons. The number of electrons equals the number of protons in a neutral atom, so argon atoms have 18 electrons. So, to sum things up, neutral atoms of argon-40 contain 18 protons, 22 neutrons, and 18 electrons.
Of what are atoms composed?
Atoms are composed of protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of the atom, while electrons orbit the nucleus in energy levels.
How do the numbers of protons neutrons and electrons for an element compare?
In the neutral state, all atoms of the same element contain equal numbers of protons and electrons. However, most elements have atoms with different numbers of neutrons. These are called isotopes.
An atoms what number is the sum of protons and neutrons?
The sum of protons and neutrons in an atom is called mass number.
What Make up nearly all of an atoms mass?
The sum of all protons and neutrons - Apex Learning
Atoms have a mass number equal to the sum of?
the protons and neutrons.
An atoms mass number equals the combination of what two things?
The mass number of an element is equal to the sum of the elements neutrons and protons.
How can an atoms mass number be determined?
it is the sum of the protons and neutrons present in the nucleus of the atom.
What makes up nearly all of the atom's mass?
The sum of all Protons and Neutrons.
In what way do these atoms corresponds and in what way do they differin terms of their mass numbers?
Atoms correspond in that they are all made up of protons, neutrons, and electrons. However, they differ in their mass numbers, which is the sum of protons and neutrons. Atoms of different elements have different mass numbers due to varying numbers of protons and neutrons.
What statement is true about atoms protons neutrons and electrons?
Several come to mind. They are both found in the nucleus of an atom. Protons have a positive charge, while neutrons have no charge. They are nearly the same size, though neutrons are a bit larger. The sum of the protons and neutrons in an isotope of an element is its mass number.
What makes up nearly all of the atoms's mass?
The sum of all Protons and Neutrons.
What determines an atoms atomic mass?
It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What is the sum of protons neutrons in an atom?
Mass number = Protons+Neutrons
What makes an atoms mass number?
An atom's mass number is determined by the sum of its protons and neutrons. Protons have a positive charge and determine the element's identity, while neutrons help stabilize the nucleus and contribute to the atom's mass.
