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

You are watching: How many neutrons are found in an atom of aluminum-27?

Video Transcript

one aluminum atom has an atomic number of 13 and also a mass variety of 27. How countless protons room there in an atom the aluminum?

Aluminum is an element. One aluminum atom is composed of a positively fee nucleus surrounded by a negatively fee electron cloud. Within the nucleus are positively fee protons and neutral neutrons. Our very first question is, how numerous protons space there in an atom that aluminum? together I’ve just said, those protons are to be discovered in the nucleus. The inquiry has provided us 2 properties of one aluminum atom that could help: the atomic number and the massive number.

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

How countless neutrons room there in one atom the aluminum?

as with protons, neutrons can be discovered in the cell nucleus of the atom that aluminum. To answer this part of the question, we’re going to need the fixed number. The fixed number is the variety of protons and also neutrons in the cell core of the atom. For this particular atom that aluminum, the mass number is 27. Therefore, in this specific atom the aluminum, the variety of protons and also neutrons is 27. So we have the right to calculate the number of neutrons by taking the number of protons far from the variety of protons and also neutrons. Therefore, the number of neutrons is equal to 27 protons and neutrons minus 13 protons, i beg your pardon we have the right to simplify to 27 minus 13 which offers us 14 neutrons. This is the same number we would acquire if us took away the atom number from the massive number. Therefore this specific atom the aluminum has 14 neutrons.

Now, top top the last part of this question.

How plenty of electrons space there in one atom of aluminum?

The electron of one atom that aluminum can be discovered in the room around that nucleus. In order come answer this question, we need three bits of information. The very first piece of details is that atoms in this context room neutral overall. Individual protons are stated to have a fee of optimistic one and electrons are claimed to have actually a fee of an unfavorable one. Neutrons have actually no charge whatsoever. So we don’t require to encompass them in this part of the question. The in its entirety charge because that an atom or ion is constantly the full charge the the protons plus the total charge the the electrons.

In this case, we have 13 protons. So the fee of the protons is same to 13 multiplied by the charge per proton positive one. The total charge of our electrons is unknown because we don’t understand the variety of electrons. But if we did, the full charge the electrons would certainly be same to the number of electrons multiplied by the charge per electron, an unfavorable one. In this case, we recognize that the overall charge is equal to zero. V a little bit that jiggling about, we have the right to see the the variety of protons is same to the variety of electrons indigenous neutral particle. Therefore, for an atom that aluminum, there space 13 electrons inside it.

See more: I Can T Help But Wait Lyrics, Trey Songz I Cant Help But Wait Lyrics

therefore we’ve demonstrated that for one aluminum atom which has actually the atomic number of 13 and has a mass number of 27, there space 13 protons, 14 neutrons, and 13 electrons.

Course Menu

Chemistry Atoms are the Smallest type of elements elements Make up the periodic Table The periodic Table Is a Map the the aspects elements Combine to form Compounds chemistry Bonds organize Compounds with each other Substances’ Properties count on their Bonds chemical Reactions change Arrangements of atom The Masses of Reactants and also Products room Equal chemical Reactions indicate Energy alters Life and also Industry rely on chemistry Reactions A solution Is a form of Mixture The lot of Solute the Dissolves have the right to Vary Solutions deserve to Be Acidic, Basic, or Neutral steel Alloys space Solid mixture Carbon-Based Molecules are in plenty of Materials