Total number of neutrons in 4 oxygen = 8 x 4 = 32 Total number of electrons in 4 oxygen = 8 x 4 = 32 Total number of protons in 4 oxygen= 8 x 4 = 32 Number of neutrons per atom = A – Z = 16 – 8 = 8 Number of protons per atom= atomic number = 8 Total number of neutrons in 1 phosphorous = 16 x 1 = 16 Total number of electrons in 1 phosphorous = 15 x 1 = 15
Total number of protons in 1 phosphorous = 15 x 1 = 15 There is 1 phosphorous atom in the molecule Number of neutrons = A – Z = 31 – 15 = 16 Number of nucleons = Atomic mass number = 88Ĭalculate the number of electrons, protons, and neutrons in the following species. Neutron number = Number of neutrons = A – Z = 88 – 38 = 50 Number of nucleons = Atomic mass number = 56 Neutron number = Number of neutrons = A – Z = 56 – 26 = 30 Number of nucleons = Atomic mass number = 16 Neutron number = Number of neutrons = A – Z = 16 – 8 = 8 Number of nucleons = Atomic mass number = 13 Neutron number = Number of neutrons = A – Z = 13 – 6 = 7 Neutron number = Number of neutrons = A – Z = 40 – 20 = 20 Number of nucleons = Atomic mass number = 80 Neutron number = Number of neutrons = A – Z = 80 – 35 = 45 Number of nucleons = Atomic mass number = 40 Neutron number = Number of neutrons = A – Z = 40 – 18 = 22 Number of nucleons = Atomic mass number = 37 Neutron number = Number of neutrons = A – Z = 37 – 17 = 20 Number of nucleons = Atomic mass number = 24 Neutron number = Number of neutrons = A – Z = 24 – 12 = 12 Number of nucleons = Atomic mass number = 31 Neutron number = Number of neutrons = A – Z = 31 – 15 = 16 The mass number is denoted as ‘A’.Ĭalculate the number of electrons, protons, and neutrons in the following atoms. The total number of protons and neutrons present in the nucleus of an atom of the element is called mass number. The number of neutrons present in the nucleus of an atom is known as neutron number.
The number of protons (positive charge) present in the nucleus of an atom of a particular element is called the atomic number of that element.
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