number of protons, neutrons and electrons?

i believe that it has 13 of electrons and 13 protons with 14 neutrons. 13 protons + 14 neutrons = mass number of 27.

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Theoretically the number of protons and electrons will be equal if the universe is overall neutral although the presence of positrons and anti-protons etc. would complicate the picture. The number of neutrons is almost certainly not equal to the number of protons or electrons as most atoms have more neutrons then protons in the nucleus and only in the first 20 or so elements is the ratio anywhere close to 1:1. The most abundant atoms in the universe are H atoms which have 1 proton, 1 electron but no neutrons at all which would suggest that protons and electrons should each outnumber neutrons overall. The matter is complicated even further by the fact that neutrons in radioactive elements which decay by emitting beta particles (high energy electrons) are continually being converted into protons so the number of each particle at any time is not fixed.

Protons and electrons 13. Neutrons 14.

There are 13 protons, 13 electrons, and 14 neutrons.

Aluminum

26( atomic mass) - 13 (atomic number) = 13 neutrons

protons are the atomic number which is 13 +14 ( added onto the aluminum) = 27

therefore when you draw out the lewis dot it should have 3 on the outer shell + 14 = 17 electrons

if the protons and neutrons are equal then the amount of electrons are the same as protons and neutrons.

sorry if this isn't right!!

Number of protons = Atomic number

Number of electrons = Atomic number minus the charge (if it is ion)

Number of neutrons = Mass number minus Atomic number

Number of Protons:

Look at the periodic table. Each element is assigned a number called the atomic number -- it is usually written in large on the periodic table. That number tells you the number of protons in the nucleus of each element. The atomic number is always the same as the number of protons. The number of protons in the nucleus uniquely identifies an element.

Number of Electrons:

The number of electrons in an element can change. For a neutral atom (net charge of zero), the number of protons is exactly equal to the number of electrons. So the number of electrons is also the same as the atomic number.

However, it is possible to remove electrons and not change the identity of an element. These are called ions. The charge on the ion tells you the number of electrons -- the number of electrons is the atomic number minus the charge on the ion if it's an ion. If the charge is positive, subtract that number from the atomic number to get the number of electrons (with a positively charged ion, you will then have less electrons than protons).

If the charge is negative, subtract the charge (but note you are subtracting a negative number, which is the same as adding the magnitude of the charge to the atomic number (with a negatively charged ion, you with then have more electrons than protons).

Number of Neutrons:

The number of neutrons in an element can also vary, and if two atoms of the same element have different numbers of neutrons, then they are called isotopes. To figure out how many neutrons are in the nucleus, you must know the mass number. Note that you cannot determine the number of neutrons for an element, only for one isotope of that element -- so you have to know which isotope you are being asked about.

Usually, a specific isotope is written like this: silicon-30 or carbon-12 or aluminum-26. It can also be written like this though, when using the symbol for the element instead of its full name: 30Si or 12C or 26Al. The number is called the mass number, and the mass number is equal to the sum of the number of protons plus the number of neutrons.

So if you know the mass number and you know the atomic number (if you know the name of the element, that tells you the atomic number because each element has only one atomic number), to find the number of neutrons, subtract the mass number from the atomic number.

Here are some examples:

The element hydrogen (H) has atomic number of 1, so it has one proton in the nucleus, and one electron. The hydrogen ion (H+) has zero electrons, and the hydrogen ion (H-) has 2 electrons. Most hydrogen atoms don't have any neutrons (these are written 1H), but there exists an isotope called deuterium (also 2H) which has one neutron, and another isotope called tritium (also 3H) which has 2 neutrons.

The element fluorine (F) has atomic number 9, so it has nine protons. The neutral atom also has 9 electrons, but F is commonly found as a negative ion F-, which has 10 electrons. The most common isotope of fluorine has 10 neutrons, and so it has a mass number of 19, and is written Fluorine-19 or 19F. There also exists another isotope, fluorine-18 or 18F, which only has 9 neutrons, but this isotope is not stable.

27 neutrons, 13 protons and electrons

There are 13 protons in an atom of aluminum, regardless of the isotope. If it didn't have 13 protons, it wouldn't be aluminum, it would be something else. There are 14 neutrons in an atom of aluminum 27, its only stable isotope.

Atomic Number 13

Aluminum Atomic Number