One atom of aluminum has 13 protons and 14 neutrons. Protons are the positively charged particles in an atom, while neutrons are subatomic particles that have no charge.Continue Reading
It is possible to determine the number of neutrons in an atom by subtracting the number of protons in the atom from the atom's mass number. On the Periodic Table of the Elements, the atomic weight of an element is listed below that element. Rounding this atomic weight to the nearest whole number yields the element's mass number.
In the case of aluminum, the mass number is 27. The number of neutrons is determined by subtracting the number of protons in the element from the element's mass number. There are 13 protons in an atom of aluminum, so the equation would be 27-13=14.
Some atoms of aluminum do not have 14 neutrons. These atoms are called isotopes. Al-26 is an aluminum isotope with a half-life of 730,000 years. Al-28 has a much shorter half-life of 2.3 minutes.
A neutral atom of aluminum also has 13 electrons. Electrons are the negatively charged particles in an atom. A neutral atom has no net charge, so the protons charges and electron charges must cancel each other out. Aluminum has 14 positively charged protons and 14 negatively charged electrons, giving it a net charge of zero.Learn more about Atoms & Molecules
There are three primary components inside an atom: neutrons, electrons and protons. The neutrons have no charge, while the protons have a positive charge and electrons have a negative charge. The neutrons and protons exist in a dense center area called the nuclei, while the electrons exist in another space, called orbitals, around the nuclei.Full Answer >
An atom is comprised of a central portion called a nucleus that contains protons and neutrons. Electrons orbit the nucleus and are typically found in a one-to-one ratio with protons. Different stable atomic configurations are called elements. Hydrogen is unique in having one proton, one electron and no neutrons.Full Answer >
The subatomic particles of protons and neutrons are found in the nucleus of an atom. Protons are particles with a positive charge, while neutrons have no charge. Electrons, which have a negative charge, are particles that can found orbiting outside the nucleus of an atom.Full Answer >
To find the mass number of an element or isotope, add the neutrons and protons in one atom. Hydrogen is just one element with multiple isotopes occurring naturally, appearing in atomic form with just one proton (mass number 1), and two isotopes, one with one neutron and another with two.Full Answer >