An aluminum atom has actually an atomic variety of 13 and also a mass variety of 27. A) How numerous protons space there in one atom the aluminum? b) How countless neutrons room there in an atom the aluminum? c) How numerous electrons room there in one atom the aluminum?

You are watching: How many neutrons does al have

Video Transcript

one aluminum atom has actually an atomic variety of 13 and a mass number of 27. How numerous protons are there in an atom the aluminum?

Aluminum is one element. An aluminum atom consists of a positively fee nucleus surrounding by a negatively charged electron cloud. Within the nucleus space positively fee protons and neutral neutrons. Our first question is, how many protons are there in one atom the aluminum? as I’ve simply said, those protons are to be uncovered in the nucleus. The inquiry has provided us 2 properties of one aluminum atom that can help: the atomic number and also the fixed number.

The atomic variety of an atom is the number of protons in the cell core of that atom. For this aluminum atom and indeed every aluminum atoms, the atom number is same to 13. Therefore, the number of protons in an atom that aluminum is 13. I’ll simply store away the value since it will certainly come in comfortable later.

How numerous neutrons space there in an atom the aluminum?

similar to protons, neutrons deserve to be found in the cell nucleus of the atom the aluminum. To answer this part of the question, we’re walking to require the fixed number. The mass number is the number of protons and also neutrons in the nucleus of the atom. For this details atom of aluminum, the fixed number is 27. Therefore, in this specific atom of aluminum, the variety of protons and neutrons is 27. For this reason we deserve to calculate the number of neutrons by acquisition the variety of protons away from the variety of protons and neutrons. Therefore, the variety of neutrons is equal to 27 protons and neutrons minus 13 protons, i m sorry we can simplify come 27 minus 13 which gives us 14 neutrons. This is the exact same number us would get if we took away the atom number native the massive number. Therefore this details atom that aluminum has 14 neutrons.

Now, onto the last part of this question.

How countless electrons are there in one atom that aluminum?

The electron of one atom the aluminum have the right to be found in the an are around its nucleus. In order to answer this question, we need three bits that information. The first piece of info is the atoms in this context are neutral overall. Individual protons are claimed to have a charge of hopeful one and also electrons are claimed to have a charge of negative one. Neutrons have no fee whatsoever. So we don’t require to encompass them in this part of the question. The overall charge for an atom or ion is constantly the full charge the the protons plus the complete charge that the electrons.

In this case, we have actually 13 protons. For this reason the fee of the protons is same to 13 multiplied by the charge per proton hopeful one. The total charge of our electrons is unknown since we don’t know the number of electrons. But if us did, the complete charge the electrons would be same to the number of electrons multiplied by the fee per electron, an unfavorable one. In this case, we know that the all at once charge is same to zero. Through a little bit of jiggling about, we have the right to see that the variety of protons is same to the variety of electrons native neutral particle. Therefore, for an atom the aluminum, there room 13 electrons inside it.

See more: Three Six Nine The Goose Drank Wine Lyrics, Lyrics Search 3 6 9 The Goose Drank Wine

so we’ve demonstrated the for one aluminum atom which has the atomic variety of 13 and has a mass variety of 27, there room 13 protons, 14 neutrons, and also 13 electrons.