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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?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoARGON has 18 electrons, with an atomic number of 18 and an Atomic Mass of 40. It has 22 neutrons, is considered a Nobel gas, in that it is inert under most conditions, and is colorless.
Wiki User
∙ 10y agonumber of electrons in a neutral atom is same as the atomic number = 20 (in this case)
Wiki User
∙ 14y ago20 electrons, 20 protons and 22 neutrons
Wiki User
∙ 14y ago20
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How do you work out how many electrons in an atom?
An atom's atomic number is the number of electrons.
How many electrons are on a boron atom?
5- the atomic number of boron is 5. Atomic number is the number of protons and this is the same as the number of electrons in the neutral atom.
How many electrons in an atom with the atomic number 8?
There are 8 electrons.
How many electrons orbit the nucleus if the atom has no charge?
If the atom has no charge, then the number of electrons is the same as the number of protons (atomic number).
How many electrons does an atom with an atomic number of 20 have?
Of course, 20 electrons.
How do you work out how many electrons in an atom?
An atom's atomic number is the number of electrons.
How many electrons are in a neutral atom atomic number 6?
In a neutral atom, the number of electrons is always the same as the atomic number.
How many electrons are on a boron atom?
5- the atomic number of boron is 5. Atomic number is the number of protons and this is the same as the number of electrons in the neutral atom.
How many electrons in atom with atomic number of 9 and atomic mass of 19 and is electrically neutral?
Since the atom is electrically neutral, the number of electrons must be the same as the number of protons in the atom, which is the definition of atomic number. Therefore, there are 9 electrons.
How many electrons in an atom with the atomic number 8?
There are 8 electrons.
What does the atomic number describe about an atom?
The number of protons in the nucleus of an atom
How many electrons are in the element selenuim?
Atomic number= No. of electrons in the atom. Atomic no. of selenium=34. Therefore,selenium has 34 electrons in each of its atom.
How many electrons does an atom potassium havew?
Finding the number of electrons in an atom is easy. You just have to know the atomic number of the element. The atomic number for Potassium is 19. That means Potassium has 19 electrons.
If a atom of tin has a mass of 118 and an atomic number of 50 how many electrons does it have?
If the atomic number is 50, the number of electrons is 50.
How many electrons are present in an atom?
That depends on the element you are considering. For a neutral atom, the number of electrons = number of protons = atomic number
How many electrons orbit the nucleus if the atom has no charge?
If the atom has no charge, then the number of electrons is the same as the number of protons (atomic number).
An atom of the element has an atomic number of 12 and an atomic of weight 24 How many electrons does it have?
It will have 12 electrons.
