mass no. = no. of protons + no. of neutrons
The mass number is the total number of protons and neutrons in an atom's nucleus. The number of protons is the same as the element's atomic number, so the number of neutrons is the mass number minus the atomic number. The mass number can be determined by rounding the atomic weight to the nearest whole number. Also, the mass number is given as part of an isotope's name, for instance: Carbon-14 has a mass number of 14.
Atomic number is the number of protons and electrons in a neutral atom. Atomic Mass minus atomic number is the number of neutrons in the atom. Neutrons and protons have relatively equal masses and electrons are comparatively "weightless" therefore, the sum of the masses of protons and neutrons equals the atomic mass.
Atomic number is equal to the number of protons.
Atomic mass is sum of the number of protons and neutrons.
The mass number of an isotope of an element is the sum of the protons and neutrons in the atomic nucleus.
The atomic weight is the mass of protons, neutrons and electrons; the mass of electrons is not significant.
Protons + Neutrons = Mass Number
P-tons + N-tons = Mass Number
The mass number is the sum of protons and neutrons.
the total number of protons and neutrons in the nucleus.
protons and neutrons in the nucleus of an atom. Isotopes of an element have the same number of protons but different numbers of neutrons. The number of neutrons in an atom affects its stability and often determines its nuclear properties.
Atomic number = number of protons + number of neutrons Mass number = number of protons + number of neutrons
atomic mass is the number of protons in an atom mass number is the number of protons plus neutrons in an atom
2 isotopes of the same element will have the same number of protons but a different number of neutrons. The sum of protons and neutrons is the mass number, so different isotopes will have different mass numbers.
The mass number of an element is equal to the number of protons plus the number of neutrons.
The mass number is the sum of protons and neutrons.
Number of Protons: 35 Number of Neutrons:45 Number of Electrons:35
Two atoms with the same number of protons but different numbers of neutrons are called "isotopes".
Atoms of the same element cannot have different numbers of protons. Different numbers of protons mean different elements. An atom with the a different number of neutrons is called an isotope.
The atomic number is the number of protons. The atomic mass number is the the sum of the numbers of neutrons and protons combined, in this instance, 11.
The mass number.
The nucleus contains the protons and neutrons. The number of protons determines the atomic number of the element and the number of protons and the number of neutrons together determine the atomic mass.
84 protons, the same as the atomic number, and (210 - 84) or 126 neutrons. The numbers of protons and neutrons together equals the mass number.
The number of protons (and electrons in a neutral atom) is identical. The number of neutrons is different for each isotope.
No, atomic number equals the number of protons.The number of neutrons is NOT specific to an element, and various atoms of the same element can have different numbers of neutrons - these are called isotopes.