Q&A for How to Find the Number of Neutrons in an Atom

Fortunately, there's a WikiHow article that can help you! It's called Find the Number of Protons, Neutrons, and Electrons. While the answer section here doesn't allow links, you can search for it in the search box at the top of the page using this title.

Atomic mass minus the atomic number. Atomic mass of Oxygen is 16, and the atomic number is 8. 16 - 8 = 8.

The modern periodic table has the atomic number on the top of each element's symbol and the atomic mass right below the symbol.

Yes. We can use the atomic number to identify the element, which is the number of protons.

The mass number is located at the bottom of the square-- no calculation needed.

The number of protons in the nucleus of the atom is equal to the chemical's atomic number.

The atomic mass will be found in the same square as the desired element on the periodic table. For example, the atomic mass of sulfur (S) would be 32.07.

The empty space between the atomic cloud of an atom and its nucleus is just that: empty space, or vacuum. That's the simple answer, but there are a few subtleties: Subatomic particles such as electrons, protons and neutrons need to be treated as quantum objects.

It depends on what you are trying to find. If the question is asking for the number of neutrons, then yes. If not, just rearrange the formula.

Add the number of protons (also known as atomic number) and neutrons in a single atom. The atomic mass can also be located in the same square as the desired element on the periodic table. For example, the atomic mass of scandium (Sc) would be 44.96.

The number of electrons in an atom corresponds to its atomic number.

Atomic mass will be located on the periodic table near the element. For example, the atomic mass of cadmium (Cd) would be about 112.41.

On the periodic table, it will usually be listed at the bottom of the element. If it has a decimal point, round it off to the nearest whole number.

Atomic mass is the mass of an atom. Atomic weight is a weighted average of the mass of all the atoms of an element, based on the abundance of isotopes, and is subject to change.

Number of neutrons = atomic mass - atomic number. Atomic mass = 1, atomic number = 1. Therefore, the number of neutrons = 1 - 1 = 0.

Subtract the number of protons, or the atomic number, from the mass number.

Cobalt Acetate. Co is cobalt, and C2H3O2 is acetate. Also, when naming ionic compounds, you do not put Greek prefixes in front of the ions.

Bromine (Br) has 35 protons, which means it has 35 electrons when neutral. Since it has a negative charge of -1, that means it has gained 1 electron. Therefore, Br- has 36 electrons.

Uranium has the largest naturally occurring nucleus with 92 protons and over 140 neutrons.

You will probably be given the atomic number for that isotope; otherwise, it would be unsolvable without further knowledge. Subtract from that number magnesium's atomic number, which is 12, to get the number of neutrons in that atom.

Platinum has an atomic number of 78, meaning it has 78 protons. Simply subtract that from the atomic mass (195) for 195 - 78 = 117 neutrons.

Electrons revolve around the nucleus because of the availability of protons within said nucleus. Similar to how the moon revolves around Earth, electrons are attracted to the protons (not due to gravity, rather due to the fact that opposite charges are attracted to each other), yet are simultaneously being pushed away due to the presence of other electrons (since similar charges repel).

There will be the same amount of neutrons in an atom of helium as the atomic number of helium is. this is 2. so you will do 2 times 6 (six atoms of helium) to get the number.

The mass number is the atomic weight (top right in the periodic table), rounded off to the nearest whole number.

Protons and neutrons are what make up the nucleus of an atom, and also determine what type of element the atom is. Protons have a +1 charge while neutrons have no charge.

An element will always have the same amount of electrons equal to the amount of protons they have. If the element is an ion, however, the amount of electrons it has will vary depending on what type of element it is.

Helium is in group zero, meaning it has a valency of zero. This is because it has a full outer shell of electrons. There are very few compounds including elements from group zero (i.e. the noble gases).

The charge is due to the gain or loss of electrons, which have negligible mass. If an atom is charged, it won't affect its no. of protons or its mass. So, simply do: No. of neutrons = Mass no. - no. of protons.

In nature, atoms with the same atomic no. but different atomic mass exists. They are called isotopes. Now, these isotopes are found in different quantities. So, considering the atomic mass and the amount of isotopes, we find the average atomic mass. This average has decimals. For the calculations, round off the atomic mass to the nearest whole number.

The mass of an electron is 1/1836 the mass of protons. Because it is so small with respect to protons and neutrons, it is not considered.