Selenium
The radioactive isotope 198Au has the mass number 198.
The atomic number of any bromine atom is 35, and the atomic mass number is the number stated after the element name in the question, in this instance 79.
An atom with an atomic number of 79 has 79 protons in its nucleus. Since the atomic number represents the number of protons, this atom also has 79 electrons. The mass number (197) represents the sum of protons and neutrons, so subtracting the number of protons (79) gives the number of neutrons: 197 - 79 = 118 neutrons.
An atom of selenium with an atomic number of 34 has 34 electrons. The mass number of 79 suggests that the total number of protons and neutrons in the nucleus is 79. Since the atomic number (protons) is given as 34, the number of neutrons can be calculated as 79 - 34 = 45.
Gold's atomic number is 79 and its atomic mass is 197 (on avarage) 197-79=118 neutrons.
The number of protons in an atom of any atomic number is the same as the atomic number, because that is the definition of atomic number. Therefore, in the given question, the answer is 34; the mass number is not needed to answer.
The mass number is the sum of protons and neutrons in the nucleus of an atom. In this case, an atom of gold with 79 protons and 118 neutrons would have a mass number of 197 (79 protons + 118 neutrons = 197 mass number).
No, an atom of aluminum and an atom of gallium do not have the same atomic mass. Aluminum has an atomic mass of approximately 26.98 atomic mass units, while gallium has an atomic mass of approximately 69.72 atomic mass units.
Z is atomic number A is atomic mass N is number of neutrons Z=A-N 79 = 179 - N 179-79=100 so number of neutrons is equal to 100 This is one thing you can get from that given.
Proton + Nuetron = Atomic Mass
The atomic mass of an atom is the combined mass of the protons and neutrons in the nucleus.
Bromine is a non metal element. Atomic mass of it is 80.