So the charge of the protons is equal to 13 multiplied by the charge per proton positive one. The overall charge for an atom or ion is always the total charge of the protons plus the total charge of the electrons. So we don’t need to include them in this part of the question. Individual protons are said to have a charge of positive one and electrons are said to have a charge of negative one. The first piece of information is that atoms in this context are neutral overall. In order to answer this question, we need three bits of information. The electrons of an atom of aluminum can be found in the space around its nucleus. How many electrons are there in an atom of aluminum? Now, onto the last part of this question. So this particular atom of aluminum has 14 neutrons. This is the same number we would get if we took away the atomic number from the mass number. Therefore, the number of neutrons is equal to 27 protons and neutrons minus 13 protons, which we can simplify to 27 minus 13 which gives us 14 neutrons. So we can calculate the number of neutrons by taking the number of protons away from the number of protons and neutrons. Therefore, in this particular atom of aluminum, the number of protons and neutrons is 27. For this particular atom of aluminum, the mass number is 27. The mass number is the number of protons and neutrons in the nucleus of the atom. To answer this part of the question, we’re going to need the mass number. How many neutrons are there in an atom of aluminum?Īs with protons, neutrons can be found in the nucleus of the atom of aluminum. I’ll just store away that value because it will come in handy later. Therefore, the number of protons in an atom of aluminum is 13. For this aluminum atom and indeed all aluminum atoms, the atomic number is equal to 13. The atomic number of an atom is the number of protons in the nucleus of that atom. The question has given us two properties of an aluminum atom that might help: the atomic number and the mass number. Our first question is, how many protons are there in an atom of aluminum? As I’ve just said, those protons are to be found in the nucleus. Inside the nucleus are positively charged protons and neutral neutrons. An aluminum atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. How many protons are there in an atom of aluminum?Īluminum is an element. It is typically located as a subscript to the left of the element symbol.An aluminum atom has an atomic number of 13 and a mass number of 27. The atomic number is the smaller of the two numbers in the symbol. For example, if the symbol is written as 14 6C, the number "6" is listed.
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