40, the sum of the protons and neutrons.
Calcium has 20 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a calcium atom = Mass number - 20
The mass number of an atom is the total number of protons and neutrons in its nucleus. For an atom with a mass number of 19, it would have 19 total protons and neutrons combined. This atom could be potassium-40 (19 protons and 21 neutrons) or calcium-40 (20 protons and 20 neutrons), for example.
A neutral atom of calcium with a mass number of 41 would have 20 protons since calcium has an atomic number of 20. To find the number of neutrons, you subtract the atomic number from the mass number, so there would be 21 neutrons in this atom.
A mass number is the sum of numbers of protons and neutrons in an atom. Therefore, an element with a mass number of 65 and 36 neutrons contains (65 - 36) or 29 protons and is therefore an atom of copper.
protons and neutrons in an atom. It is the sum of protons and neutrons in the nucleus of an atom.
The mass number of an atom of calcium with twenty protons and twenty neutrons is 40. This is because the mass number is the sum of the protons and neutrons in the nucleus of an atom.
Calcium has 20 protons, 20 electrons and 20 neutrons in its most commonly found isotope.
Calcium has 20 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a calcium atom = Mass number - 20
An atom of calcium-42 has 20 protons, as calcium has an atomic number of 20. Since the atomic number represents the number of protons in an atom, calcium always has 20 protons. Calcium-42 also has 22 neutrons, calculated by subtracting the atomic number from the atomic mass (42 - 20 = 22). The number of electrons in a neutral atom is equal to the number of protons, so a calcium-42 atom would have 20 electrons.
There are 20 p , n , e- in an atom of calcium. Its atomic number is also 20.
mass number = number of protons + number of neutrons. 47 = 20 + neutrons, so neutrons equal 27.
The number of protons in a calcium atom is always the same as the atomic number of calcium, which is 20. The number of neutrons depends on the isotope. The most common isotope is Ca-40. The number of neutrons is equal to the isotopic mass number minus the atomic number, in this instance, also 20.
The atom with 20 protons and 22 neutrons would be Calcium (Ca) with atomic number 20 and mass number 42 (20 protons + 22 neutrons).
Calcium: The identity of an element is determined by how many protons each atom of the element has, and calcium is the name of the element with 20 protons per atom.
An atom contains protons, neutrons, and electrons. The electrons are tiny. They can be found in a fast-moving cloud, orbiting the nucleus. Each electron has a charge of -1. The nucleus contains the protons and neutrons, which are packed tightly together. The protons each have a charge of +1, and the neutrons have a charge of zero. The mass number of an element is the number of protons and the number of neutrons added together. Since the number of protons is equal to the atomic number of the element, the number of neutrons can be found by subtracting the atomic number from the mass number.
it is about the atomic number. Calcium is the element.
A calcium isotope with a mass number of 42 would have 20 protons since calcium always has 20 protons. The mass number includes both protons and neutrons, so subtracting the number of neutrons (mass number - number of protons) gives the number of protons.