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No. In most atoms the mass number is at least twice the atomic number. A mass number that is the same as the atomic number would indicate a nucleus with no neutrons. Such a nucleus would be highly unstable except in the case of the hydrogen-1 nucleus, which consists of a single proton. In most other stable nuclei there are at least as many neutrons as their are protons. The mass number is the sum of the number of protons and the number of neutrons.
What else can I help you with?
Which term describes the sum of the number of protons and neutrons in an atom?
when you could check in most of atoms that we have you will see that the sum of protons and electrons equals to or is called the atomic weight or atomic mass...that is if you add protons to electrons you have your atomic mass.
What is the mass number of most atoms of oxygen?
The most common isotope of oxygen has a mass number of 16. This isotope, known as oxygen-16, accounts for over 99% of naturally occurring oxygen atoms.
Why is the atomic number used to identify atoms instead of atomic mass?
Atomic Number is the number of protons in the nucleus. It is also the number of electrons the atom has. It is the number of electrons that determines the chemical behavoir of the atom. Mass number is the number of Protons and Neutrons the nucleus has. Neutrons have no effect on the electron number and therefore on the atom's chemical behavoir. So atoms with the same Atomic Number and different Mass Number all have the same chemical properties. This then is a usefull way to define an "element". Atoms with different Atomic Numbers will have very different chemical properties, regardless if their Mass Numbers are equal or not so it would not be very usefull to call two atoms with different chemical properties the same element.
Does the atomic mass tell how many atoms are in an element?
The atomic mass tells how much amu one atom of an element weighs. It, minus the atomic number, rounded to the nearest one, gives you the number of neutrons in an atom. The atomic number is the number of electrons and protons. Protons have a positive charge, electrons have a negative charge, and neutrons are neutral.
Which trem describes the sum of the number of protons and neutrons in an atom?
"Atomic mass" is the sum of the number of protons and neutrons in the nucleus of the atom. All atoms of an element have the same number of protons. For example, all iron atoms have 26 protons. But while most (90%) have 30 neutrons, there are isotopes of iron that have anywhere from 26 to 36 neutrons. So the published "atomic mass" is the weighted average of the combined number of protons and neutrons. That's why the atomic number is always a whole number, but the atomic mass is a decimal.
Which term describes the sum of the number of protons and neutrons in an atom?
when you could check in most of atoms that we have you will see that the sum of protons and electrons equals to or is called the atomic weight or atomic mass...that is if you add protons to electrons you have your atomic mass.
Is the atomic mass equal to the number of atoms in the elements?
The mass number of an isotope of an element is equal to its atomic mass number. However, the atomic weight of an element is a weighted average of the isotopes that occur in the element in nature. Because almost all elements have more than one naturally occurring isotope (if they have any), the atomic weights of most elements are not integers, as mass numbers always are.
What is the mass number of most atoms of oxygen?
The most common isotope of oxygen has a mass number of 16. This isotope, known as oxygen-16, accounts for over 99% of naturally occurring oxygen atoms.
Most calcium atoms have an atomic number of 20 and a mass number of 40 but some calcium atoms have a mass number of 48 What word could you use to describe these two kinds of calcium atoms?
Isotopes. Calcium atoms with a mass number of 40 represent the most common isotope, while those with a mass number of 48 are a less common, but still natural, isotopic form of calcium.
Why is the atomic number used to identify atoms instead of atomic mass?
Atomic Number is the number of protons in the nucleus. It is also the number of electrons the atom has. It is the number of electrons that determines the chemical behavoir of the atom. Mass number is the number of Protons and Neutrons the nucleus has. Neutrons have no effect on the electron number and therefore on the atom's chemical behavoir. So atoms with the same Atomic Number and different Mass Number all have the same chemical properties. This then is a usefull way to define an "element". Atoms with different Atomic Numbers will have very different chemical properties, regardless if their Mass Numbers are equal or not so it would not be very usefull to call two atoms with different chemical properties the same element.
Atomic number 10 atomic weight 22?
Atomic number 10 is Nickel but it's atomic number is 28 not 22. Titanium has an atomic number of 22.
Does the atomic mass tell how many atoms are in an element?
The atomic mass tells how much amu one atom of an element weighs. It, minus the atomic number, rounded to the nearest one, gives you the number of neutrons in an atom. The atomic number is the number of electrons and protons. Protons have a positive charge, electrons have a negative charge, and neutrons are neutral.
The atomic mass and atomic number of berkelium?
The most stable isotope of berkelium - 247Bk - has an atomic mass of 247. The atomic number of berkelium is 97.
Which trem describes the sum of the number of protons and neutrons in an atom?
"Atomic mass" is the sum of the number of protons and neutrons in the nucleus of the atom. All atoms of an element have the same number of protons. For example, all iron atoms have 26 protons. But while most (90%) have 30 neutrons, there are isotopes of iron that have anywhere from 26 to 36 neutrons. So the published "atomic mass" is the weighted average of the combined number of protons and neutrons. That's why the atomic number is always a whole number, but the atomic mass is a decimal.
Does atomic number equal atomic mass?
No, the atomic number and atomic mass are different. Atomic number represents the number of protons in an atom's nucleus, while atomic mass is the average mass of an atom of an element, taking into account the number of protons and neutrons.
What is the mass number and atomic number of nitrogen?
Mass number: 14 Atomic/proton number: 7 If you look at the periodic table, the mass number is the top and the atomic number is the bottom number.
Is mass used as a method of counting atoms?
Mass is not used as a method of counting atoms directly. Instead, the atomic mass unit (amu) is used to measure the mass of individual atoms relative to the mass of a carbon-12 atom. The mole is the unit used to count atoms, with 1 mole containing Avogadro's number of atoms.
