You need to know the charge on the atom or ion. The mass number is completely irrelevant if you have the atomic number.
The atomic number tells you the number of protons in the nucleus.
If the atom is neutral, then it has as many protons as electrons, and so the number of electrons equals the atomic number
If the atom is charged, and is thus called an ion, than take the atomic number and subtract the charge from it to give the number of electrons.
For instance, if you have a sodium ion with charge +1 (Na+), then the number of protons is equal to 11 (the atomic number), and the number of electrons is
11 - 1 = 10
If instead you had a chlorine ion with charge -1 (Cl-), then the number of protons is equal to 17 (the atomic number), and the number of electrons is
17 - -1 = 18
See the Related Questions to the left for more information about how to count the particles of an atom.
You can determine the number of neutrons in an atom by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number). This will give you the number of neutrons in the atom.
106 neutrons
Cl-35 isotope has 18 neutrons Cl-37 isotope has 20 neutrons
There are 6 neutrons in carbon. it depends on which isotope of carbon it is. C-12 has 6 neutrons C-13 has 7 neutrons C-14 has 8 neutrons
Nitrogen has 7 neutrons.
You can determine the number of neutrons in an atom by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number). This will give you the number of neutrons in the atom.
The isotope of zirconim, 91Zr, has 51 neutrons. In order to solve this problem, one must know that an element's atomic weight is the average of its number of protons and neutrons (only neutrons are variable). Since the atomic number is the number of protons, the atomic number subtracted from the atomic weight gives the number of neutrons. An element in period 5 that has this many neutrons is found to be zirconium (the isotope 91Zr).
This is an easy problem to solve if you have a Periodic Table of Elements.# protons + # neutrons = atomic number3 + 4 = 7The element with the atomic number 7 is Nitrogen.
Neutrons are completely separate from protons, so neutrons do not have any protons, and protons do not have any neutrons.
How many neutrons would it have if it had 11 neutrons? 11.
61 neutrons 47 protons and 47 neutrons
There are 6 neutrons.
30 neutrons for Na35Cl and 32 neutrons for Na37Cl .
106 neutrons
Titanium has 5 stable states. Ti46 has 25 neutrons Ti47 has 26 neutrons Ti48 has 27 neutrons Ti49 has 28 neutrons Ti50 has 29 neutrons All have 22 Protons.
Cl-35 isotope has 18 neutrons Cl-37 isotope has 20 neutrons
if you were to count the individual weight of all the protons neutrons and electrons you will get 40. however this is not the case when they are joined together due to something call the strong neuclear force which causes the atom to weigh 39.9