The only way I can make this question make sense is to assume you're trying to ask "how do you calculate the number of protons and neutrons in an atom?"
The name or symbol of the element will tell you the number of protons (though, if you didn't already know that, you'll likely need to look it up on a Periodic Table). For example, a carbon atom has 6 protons.
To figure out the number of neutrons, you'll need to know the Atomic Mass number. This is usually given either as a superscript to the left of the element symbol, or as a number following the name or symbol of the element (often separated by a dash). For example, "carbon 13" and "C-13" both have an atomic mass number of 13. If you don't see a number ... you're in trouble (unless the element is identified as deuterium or tritium; these have 1 proton and 1 neutron, or 1 proton and 2 neutrons, respectively). You can look up the atomic mass on a periodic table, but that will be an AVERAGE value. For example, the atomic mass given for chlorine will be somewhere in the vicinity of 35.453. That's because the two most common isotopes of chlorine are chlorine-35 and chlorine-37, in about a 3 to 1 ratio. You can't identify the number of neutrons unless you know specifically which isotope is meant.
Assuming you do know the atomic mass number; it's also the number of nucleons. Subtract the number of protons from the atomic mass number, and what's left over is the number of neutrons.
So: carbon-13 has 6 protons (because it's carbon) and 7 neutrons (because 13-6 = 7).
The masses and relative abundances of all naturally occurring isotopes of the element are required to calculate average atomic mass of the element.
The smallest quantity of an element is an atom.
An atom is the smallest piece of an element that can be identified as that element.
The number of protons in an atom of an element is equal to the number of electrons in that atom which is equal to that element's atomic number.
i don't know about 2
To calculate the atomic mass of an element, add up the mass of protons and nuetrons.
The smallest part of an element that has the properties of that element is the atom.
An isotope shares the atomic number with its element atom. How does it differ from the element atom?
The smallest part of an element that still retains its properties is an atom.
The masses and relative abundances of all naturally occurring isotopes of the element are required to calculate average atomic mass of the element.
The smallest quantity of an element is an atom.
An atom is the smallest piece of an element that can be identified as that element.
an atom is larger than an element
The number of electrons in a neutral atom is the same as the atomic number of the atom and is listed for each element in the Periodic Table found in any basic chemistry text book.
atom and elements are different because one atom makes an element and a element is a pure substance and a atom is a basic particle
Its an element and an atom.
No water is NOT an "atom". No water is NOT an "element".