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.
If the question specifically states that the particle is an atom, then we know it's neutral as opposed to a charged ion. A neutral atom will have the same number of electrons as protons. It is neutral because there is not an abundance of one subatomic particle over another, and their charges cancel each other out. Since an atom of calcium has 20 protons, then it will have 20 electrons.
NeutronsThe alkaline earth metal calcium has 20 protons in its nucleus. That's what makes it calcium; it's what gives it its elemental identity. It's in Group 2 of the periodic table. The number of neutrons in calcium varies, however, and there are several different isotopes of this metal. The four stable isotopes of calcium (Ca) are Ca-40, Ca-42, Ca-43 and Ca-44, which have 20, 22, 23 and 24 neutrons in their nuclei, respectively. About 97% of naturally occurring calcium is Ca-40.There are a number of other isotopes of calcium, and they range from Ca-34 to Ca-57. It should be noted that Ca-46 and Ca-48 have extremely long half-lives, and are pretty stable. The interesting isotope is Ca-41, which is produced by neutron capture from Ca-40. This makes it of interest in the study of stars. Use the links below for more information.
Calcium:
protons are 20
neutrons are 20, 22, 23, 24, 26 or 28
electrons are 20
Calcium:
protons are 20
neutrons are 20, 22, 23, 24, 26 or 28
electrons are 20
calcium - 39: 20 protons and 19 neutrons
calcium - 40: 20 protons and 20 neutrons
calcium - 42: 20 protons and 22 neutrons
Calcium-48: 20 protons and 28 neutrons
Calcium has 20 protons and electrons and a number of neutrons different for each isotope..
protons-20, electrons-20 and neutrons -20
Calcium has atomic number 20, which means that all calcium atoms have 20 protons in their atomic nuclei. Neutral calcium atoms also have 20 electrons. Isotopes of calcium vary in the number of neutrons in their atomic nuclei, and are named for their mass number, which is the sum of the protons and neutrons in the nucleus. You can calculate the number of neutrons (N) in an isotope by subtracting the number of protons (atomic number) from the mass number. N = 42 - 20 = 22, therefore, a calcium-42 isotope has 20 protons, 20 electrons, and 22 neutrons.
For the commonest isotope there are 42 protons , 42 electrons and 56 neutrons. However, it has several naturally stable isotopes, they have, 50 neutrons, 52 neutrons, 53 neutrons, 54 neutrons, 55 neutrons and 58 neutrons. However, for all isotopes the number of protons and electrons remains the same, otherwise it would be a different element.
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.
Lawrencium has 103 electrons and protons. The number of neutrons is different for each of the 12 isotopes of Lr.
Cl-37 : 17 protons , 20 neutrons , 17 electrons Compare with Cl-35 ; 17 protons , 18 neutrons, 17 electrons. These are two different and common isotopes of chlorine. Remember 'Different isotopes have a different number of neutrons'. Chemically they react the same.
Calcium has atomic number 20, which means that all calcium atoms have 20 protons in their atomic nuclei. Neutral calcium atoms also have 20 electrons. Isotopes of calcium vary in the number of neutrons in their atomic nuclei, and are named for their mass number, which is the sum of the protons and neutrons in the nucleus. You can calculate the number of neutrons (N) in an isotope by subtracting the number of protons (atomic number) from the mass number. N = 42 - 20 = 22, therefore, a calcium-42 isotope has 20 protons, 20 electrons, and 22 neutrons.
Calcium has 20 protons and electrons and a variable number of neutrons, depending on the isotope.
Tantalum has 73 protons and electrons and its isotopes have 108 or 107 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.
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
For the commonest isotope there are 42 protons , 42 electrons and 56 neutrons. However, it has several naturally stable isotopes, they have, 50 neutrons, 52 neutrons, 53 neutrons, 54 neutrons, 55 neutrons and 58 neutrons. However, for all isotopes the number of protons and electrons remains the same, otherwise it would be a different element.
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.
Um, the element calcium? Protons, neutrons, electrons..
Calcium is an element, which means that it is made up protons/electrons and neutrons. Each calcium atom contains a total of 20 protons/electrons, and 20 neutrons.
Helium has 2 protons and 2 electrons. He-3 and He-4 isotopes have 1 and 2 neutrons.
Lawrencium has 103 electrons and protons. The number of neutrons is different for each of the 12 isotopes of Lr.