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If you locate Argon (Ar) on the Periodic Table, you will see that it has an atomic weight 39.95 which is rounded up to 40 (hence Ar-40.) The number, 18, located at the top of Argon is it's atomic number which is a fancy way of saying "number of protons."
The atomic weight we were just talking about is the sum of the protons+neutrons. Since we are given the atomic weight and the atomic number (remember "number of protons"):
Atomic weight + Atomic number = Number of neutrons
39.95 18 22
Finding the number of electrons is the simplest part. In any atom (assuming that the atom's charge is balanced,) the number of electrons equals the number of protons. You will in most cases be assuming that the # of electrons equal the # of protons. Don't scare yourself and make it harder than it seems
What else can I help you with?
How many protons does calcium chlorine have?
Calcium has 20 protons and Chlorine has 17, so 20+17= 37 protons.
What is the protons of element calcium?
An atom's atomic number tells us how many protons it has. If we reference a periodic table, we see that calcium's atomic number is 20. Thus, calcium has 20 protons.
How many protons and electrons does a calcium atom have?
Calcium has 20 protons, 20 electrons and 20 neutrons in its most commonly found isotope.
How many protons and electrons does each calcium have?
Calcium (element number 20) has 20 protons and 20 electrons.
What characteristics do atoms argon-40 potassium-40 and calcium-40 have in common?
Atoms argon-40, potassium-40, and calcium-40 all have 40 protons, but differ in the number of neutrons in their nuclei. They are all stable isotopes, with no natural radioactivity.
How many protons does Calcium-40 have?
20
How many protons are in the nucleus in calcium?
40
What is an isotope of the element with 20 protons and 20 neutrons?
An isotope of the element with 20 protons and 20 neutrons is calcium-40. Calcium has an atomic number of 20, which means it has 20 protons. The total number of protons and neutrons in calcium-40 is 40 (20 protons + 20 neutrons).
How many neutrons does calcium-40 have?
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons
How many protons (p) neutrons (n) and electrons (e) are in an atom of calcium?
There are 20 p , n , e- in an atom of calcium. Its atomic number is also 20.
How many nucleons are in the isotope of calcium?
there are 24 stable isotopes in the element calcium.
The Atomic and mass number for calcium?
Calcium is a metal element. Atomic mass of it is 40.
The mass number of an atom of calcium with 20 protons and 20 neutrons is?
The mass number of an atom is the sum of the protons and neutrons in its nucleus. Therefore, for an atom of calcium with 20 protons and 20 neutrons, the mass number would be 40.
The mass number of an atom of calcium with twenty protons and twenty neutrons?
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.
How many protons does have calcium?
Calcium has 20 Protons. You can determine the amount of Protons in an Element by checking the top number of an element. This is called the Atomic number. Calcium has 20 protons
How many protons does calcium chlorine have?
Calcium has 20 protons and Chlorine has 17, so 20+17= 37 protons.
An atom of an element contains 20 protons 20 neutrons and 20 electons This element is?
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.
