It depends on the isotope. But if we assume Ba137 , we can find the number of neutrons by subtracting the number of protons from the mass number
137-56=81
Number of proton = atom numberfor example:Hydrogen has 1 proton and its atom number is also 1Number of neutrons + number of protons = mass numberfor example:Hydrogen have 1 proton and and NO neutrons, so the mass number is 1Helium has 2 protons and and 2 neutrons, so the mass number is 4
The atom in question has 13 protons, so is atomic number 13, which is Aluminium. Assuming that all of the atom's mass is formed from the protons and neutrons, and each of these have atomic mass 1, the number of neutrons is 27 - 13 = 14 neutrons. Almost all Aluminium is of this isotope.
To calculate the atomic mass of an atom, you would add the number of protons and neutrons together. Protons and neutrons each have a mass of approximately 1 atomic mass unit (amu). The sum of the protons and neutrons will give you the atomic mass of the atom in atomic mass units.
The mass number of an atom is the sum of its protons and neutrons. In this case, the atom has 27 protons and 33 neutrons, so the mass number would be 27 + 33 = 60.
They are not. Atomic number is the total number of protons in an atom. Mass number is the total number of protons and neutrons. The only isitope in which they are the same is Hydrogen-1 with 1 proton and no neutrons.
Number of proton = atom numberfor example:Hydrogen has 1 proton and its atom number is also 1Number of neutrons + number of protons = mass numberfor example:Hydrogen have 1 proton and and NO neutrons, so the mass number is 1Helium has 2 protons and and 2 neutrons, so the mass number is 4
The number of neutrons in an atom can be calculated by subtracting the atomic number (number of protons) from the mass number. For hydrogen, the atomic number is 1 and the mass number is also 1. Therefore, the number of neutrons in hydrogen is 1 (mass number - atomic number = 1 - 1 = 0 neutrons).
Only if the atom is hydrogen-1! The mass number of the atom is equal to the sum of the numbers of protons, which is the same as the atomic number, plus the number of neutrons. The only non-radioactive atom without neutrons is hydrogen-1.
An atom has a nucleus composed of protons and usually neutrons as well (there is only one kind of atom which has no neutrons, which is the hydrogen 1 isotope) and it also has electrons surrounding the nucleus, with the same number of electrons as the number of protons in the neutrons.
FALSE!!!! A neutral atom must have the same number of protons and electrons. The number of neutrons can vary, to form isotopes. When the number of protons and electrons are different, they are no longer atoms but IONS. If we take hydrogen as an example, it forms three isotopes. #1 ; protium ; 1 proton, 0 neutrons and 1 electrons #2 ; deuterium ; 1 proton , 1 neutron and 1 electron #3 ; tritium ; 1 proton , 2 neutrons and 1 electron Notice the protons and electrons are the same number, but the number of neutrons varies, between isotopes.
The atom in question has 13 protons, so is atomic number 13, which is Aluminium. Assuming that all of the atom's mass is formed from the protons and neutrons, and each of these have atomic mass 1, the number of neutrons is 27 - 13 = 14 neutrons. Almost all Aluminium is of this isotope.
To calculate the atomic mass of an atom, you would add the number of protons and neutrons together. Protons and neutrons each have a mass of approximately 1 atomic mass unit (amu). The sum of the protons and neutrons will give you the atomic mass of the atom in atomic mass units.
No, the number of electrons in an atom does not need to equal the number of neutrons. The number of electrons in an atom is typically equal to the number of protons in order to maintain electrical neutrality, while the number of neutrons may vary, affecting the atom's stability and isotopic properties.
atomic mass of an atom = number of neutrons + number of protons For example the Deuterium isotope of Hydrogen Atomic mass number = 2 Atomic number = 1 The atomic number is the same as number of protons, so the Deuterium isotope has 1 proton atomic mass of an atom = number of neutrons + number of protons 2 = n + 1 n = 1
The mass number of an atom is the sum of its protons and neutrons. In this case, the atom has 27 protons and 33 neutrons, so the mass number would be 27 + 33 = 60.
They are not. Atomic number is the total number of protons in an atom. Mass number is the total number of protons and neutrons. The only isitope in which they are the same is Hydrogen-1 with 1 proton and no neutrons.
The number of neutrons in a hydrogen atom will depend on which isotope of hydrogen we consider. Not all hydrogen atoms have the same number of neutrons. The vast majority of hydrogen atoms (over 99.98%) have no neutrons at all. Some have 1 (and this is called deuterium) and some have 2 (called tritium). These two isotopes occur naturally but are rare, as can be seen.To determine the number of neutrons in an atom, you must use the mass number, which is the sum of the number of protons and the number of neutrons. Since the atomic number of the element (for H, the atomic number is 1) tells you the number of protons, you can find the number neutrons by subtraction.See the Related Questions to the left for how to count the number of protons, neutrons and electrons in any atom of any element.