Atomic number = Number of protons = Number of electrons = 34
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.
Assuming that the questioner intended to write "Cr" instead of "cr", the isotopes indicated are those of the element chromium, whose atomic symbol is "Cr" and whose atomic number is 24. The atomic number is defined as the number of protons in a nucleus of each atom, and the atomic mass number, which precedes the atomic symbol, is defined as the number of protons and neutrons combined. In order to maintain electrical neutrality as is required for any atom, the number of electrons must be the same as the number of protons. From the definition of mass number, it follows that the number of neutrons is equal to the atomic mass number minus the atomic number. Therefore, each isotope named in the question has 24 protons and 24 electrons, but the isotope with mass number 58 has 32 neutrons and the isotope with mass number 63 has 32 neutrons has 39 neutrons.
In a neutral atom, there will be the same number of electrons as protons, with the number of protons being the same as the atomic number, 29. The number of neutrons it has depends on the specific isotope; however, the most common naturally occurring isotope is 63Cu, with 34 neutrons. See link below.
The mass number is the sum of the number of protons and neutrons in the nucleus of the atom which is 74. Alternative answer 58 is the answer (???)
Copper 63: 29 protons, 29 electrons, 34 neutronsCopper 65: 29 protons, 29 electrons, 36 neutronsCopper The number of protons in an atom of an element is the same as the atomic number. So finding the number of protons in an atom just consists of looking at a periodic table. Copper's atomic number is 29, so it has 29 protons.In a neutral atom, the number of electrons will equal and balance the number of protons, so it would also be 29 electrons.The number of neutrons will depend on the isotope you have. Atoms of the same element can exist with different numbers of neutrons - these are what we call isotopes. However, there are only two isotopes of copper, 63Cu and 65Cu, which have 34 and 36 neutrons respectively.
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.
The 34 protons means that this is the element that has an atomic number of 34, which is selenium. The mass number for the isotope given is 67, which is the sum of the protons and neutrons. Mass number is not the same as atomic mass. Atomic mass is the total mass of the protons, neutrons, and electrons in an atom.
Selenium (Se) has an atomic number of 34 which means in a balance atom Se will have 34 protons and 34 electrons then Se has a mass of 79 so to get the neutrons we minus the protons from the mass and we get 45 final answer: Neutrons: 45 Protons:34 Electrons: 34
An atom with 15 electrons and 19 neutrons has an atomic number of 15, which corresponds to phosphorus (P). The atomic mass can be calculated by adding the number of protons (15) and neutrons (19), resulting in a mass number of 34. Therefore, this atom is a phosphorus isotope with a mass number of 34, commonly denoted as (^{34}\text{P}).
34 protons 34 electrons 46 neutrons
For any element, this is answered in the same way. The mass number is the number of protons plus the number of neutrons, in this case 50. The atomic number is the number of protons. Subtract the atomic number from the mass number to give the number of neutrons. For any element, this is answered in the same way. The mass number is the number of protons plus the number of neutrons, in this case 50. The atomic number is the number of protons. Subtract the atomic number from the mass number to give the number of neutrons.
Assuming that the questioner intended to write "Cr" instead of "cr", the isotopes indicated are those of the element chromium, whose atomic symbol is "Cr" and whose atomic number is 24. The atomic number is defined as the number of protons in a nucleus of each atom, and the atomic mass number, which precedes the atomic symbol, is defined as the number of protons and neutrons combined. In order to maintain electrical neutrality as is required for any atom, the number of electrons must be the same as the number of protons. From the definition of mass number, it follows that the number of neutrons is equal to the atomic mass number minus the atomic number. Therefore, each isotope named in the question has 24 protons and 24 electrons, but the isotope with mass number 58 has 32 neutrons and the isotope with mass number 63 has 32 neutrons has 39 neutrons.
Selenium has an atomic number of 34, which means it has 34 protons. To find the number of neutrons in selenium-80, subtract the atomic number (34) from the isotope number (80). Therefore, selenium-80 would have 46 neutrons (80 - 34).
This isotope is shown in hyphen notation: on the left side of the hyphen is the isotope's name, and on the right side is the isotope's mass number. The mass number of an element is the total number of particles in the nucleus (the number of protons + neutrons an atom has).In order to get the number of protons an atom has, find its atomic number on the periodic table. Selenium's atomic number is 34.... wait, this doesn't make any sense. If it has a mass number of 30 and an atomic number of 34, it has -4 neutrons.I'm sorry, but it looks like you have the problem wrong.
In a neutral atom, there will be the same number of electrons as protons, with the number of protons being the same as the atomic number, 29. The number of neutrons it has depends on the specific isotope; however, the most common naturally occurring isotope is 63Cu, with 34 neutrons. See link below.
The atomic mass of an atom is calculated by adding the number of protons and neutrons. In this case, the atom has 28 protons and 34 neutrons, so the atomic mass would be 28 (protons) + 34 (neutrons) = 62.
The mass number is the sum of the number of protons and neutrons in the nucleus of the atom which is 74. Alternative answer 58 is the answer (???)