For the Calcium isotope with atomic number 20 and with isotope or mass number 40, each atom has 20 protons, 20 electrons and 20 neutrons.
This can be found easily as the atomic number of any atom = number of protons (20) and also = number of electrons(20) as each atom is electrically neutral so the +proton number has to equal the - electron number.
The Atomic Mass number (or isotope number) = number of protons + neutrons combined so in the case of calcium 40 = 20 + number of neutrons. This makes the number of neutrons 20.
Added:
Other isotopes (about 3%) of (natural occurring) Calcium are with 22, 23, 24, 26 or 28 neutrons.
All Calcium isotopes have 20 protons and 20 electrons.
Electrons have no relevant mass, and protons and neutrons both have the mass of 1u. If Calcium has the number 20, it has 20 protons (and electrons). It's mass is about 40u. Core Mass - Protons = Neutrons 40u - 20u = 20u, this means Calcium has 20 electrons, 20 protons and 20 neutrons.
A positive two ion of calcium will have 20 protons, 18 neutrons, and 18 electrons. The number of protons and neutrons in a calcium ion remains the same as in a neutral calcium atom (calcium has 20 protons and about 20 neutrons in its nucleus), but it loses two electrons to become positively charged.
Lawrencium has 103 electrons and protons. The number of neutrons is different for each of the 12 isotopes of Lr.
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.
Calcium has 20 protons and electrons and a variable number of neutrons, depending on the isotope.
Electrons have no relevant mass, and protons and neutrons both have the mass of 1u. If Calcium has the number 20, it has 20 protons (and electrons). It's mass is about 40u. Core Mass - Protons = Neutrons 40u - 20u = 20u, this means Calcium has 20 electrons, 20 protons and 20 neutrons.
The atomic number of calcium is 20 and relative atomic mass (nucleon number) 40.1. The nucleon number is a decimal because it is an average value having taking all the different isotopes into consideration, based on their relative abundance. So all calcium atoms have 20 protons and 20 electrons. The number of neutrons will depend on what isotope of calcium we are talking about; calcium has 24 isotopes. If we consider the isotope calcium-40, which is the most abundant of all at about 97%, the can determine its number of neutrons as 40 - 20 = 20. So a calcium-40 isotope has 20 neutrons.
Tantalum has 73 protons and electrons and its isotopes have 108 or 107 neutrons.
A positive two ion of calcium will have 20 protons, 18 neutrons, and 18 electrons. The number of protons and neutrons in a calcium ion remains the same as in a neutral calcium atom (calcium has 20 protons and about 20 neutrons in its nucleus), but it loses two electrons to become positively charged.
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
Krypton # of protons: 36 # of electrons: 36 # of neutrons: 83.798(2)
Uranium isotopes have 92 protons and electrons; the number of neutrons is different for each isotope.Number of neutrons = Mass number - Number of protons
The question is worded a little strangely, but if the alternate wording is correct I can answer. Calcium 45 has 20 Protons (like all calcium isotopes) and 25 Neutrons. That makes 65 up quarks and 70 down quarks. Electrons may vary with ionization, but will typically be 20.
An isotope of zirconium will have protons, neutrons, and electrons. Zirconium typically has 40 protons and varying numbers of neutrons in its isotopes. Electrons surround the nucleus of the atom, balancing the positive charge of the protons.
Lawrencium has 103 electrons and protons. The number of neutrons is different for each of the 12 isotopes of Lr.
Um, the element calcium? Protons, neutrons, electrons..