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If an atom has a mass number of 40 and an atomic number of 20 how many electrons does it have?
There are many isotopes that have a mass number of 40. Calcium 20 has a mass number of 40 but so does potassium 21 and Argon 22. Calcium twenty however is probably the one you want as it is more common then the other isotopes listed.
The atomic number is based on what?
It is based on number of protons. Consider an element has 20 protons.Its atomic number is twenty.
Which element's atoms contains twenty nine protons?
It is element 29 on the periodic table. The elements in the periodic table are arranged according to increasing atomic number. The atomic number is the number of protons in the element's atoms.
How many neutrons are in nickel Ni?
If you're asking about a nickel atom, it depends on the isotope. In the case of the most common isotope, the answer would be 30. If you're asking about a nickel coin, I get about 1.625 x 1024. If this was for a homework problem, you'll probably want to carry out your own calculations or face embarrassing questions about how you arrived at that number. (It's also quite possible that I made a mistake.)
What element has twenty six protons?
The element with 26 protons is iron (Fe).
What element has twenty neutrons?
Calcium has twenty protons and twenty electrons. The main isotope of calcium also has twenty neutrons.
How many protons and neutrons does a sodium with a mass number of twenty three have?
11 protons and 12 neutrons are there in Na-23.
Element whose neutral atoms have twenty protons?
''CA" (CAlCiUM)
How many protons does an atom with an atomic number of twenty-four and a mass number of fifty-one have?
The atomic number is equal to the number of protons in the atom. Therefore, if an element has an atomic number of 24 (which in this case is chromium) then it has 24 protons. The mass number is the sum of the number of protons and neutrons.
What element is a alkali metal with twenty protons?
It is calcium.
How does an atom Argon-38 compare to an ordinary Argon-36 atom?
Argon 38 has eighteen protons and twenty neutrons. Argon 36 has eighteen protons and eighteen neutrons.
Calcium's atomic number?
Calcium is a metal element. atomic number of it is 20.
What scientific element has 20 electrons?
Calcium has twenty electrons in each atom.
What is the isotope of atom?
An isotope atom of an element is one with the same number of protons in the nucleus (i.e the atomic number) but with a different number of neutrons giving it a different mass. Isotopes have the same chemistry because they have identical valence shells. An example is chlorine which is found in nature with two stable isotopes 35Cl with 18 neutrons and 37Cl with twenty. As 35 is around 75% and 37 25% in nature the atomic weight is 35.453.
What is the atomic number of an atom with twenty six protons?
26
What is the elemental symbol for an atom with 20 protons?
Calcium, of the alkali earth metal group, has twenty protons and thus an atomic number of 20. The atomic number for an atom is the total amount of protons (positive particles) in an atom. This group comprises the second group according to IUPAC style on the periodic table. Calcium, like the others in its family, is a soft, silverish metal. They are reactive, though not so much as the alkali metals. The electron rings of Calcium are organized 2,8,8,2. The other elements in this family include: Beryllium, Magnesium, Calcium is the third, Strontium, Barium, and Radium.
If a calcium atom has twenty protons then how many electrons would it have?
20 (any more or less and it would be an ion not an atom)
