Two or more atoms of the same element having different atomic masses as a result of having a different number of neutrons are said to be called this.
The normal, expected location of an electron in a neutral atom.
When an electron absorbs energy, it "jumps" to a higher orbital and is said to be in this state.
One of more than 110-known fundamental building blocks of matter. These particles cannot be broken down by chemical means.
A unit of measurement equivalent to the mass of a single proton.
A positively-charged subatomic particle having a mass of 1 AMU and located in the nucleus of an atom.
A characteristic pattern of light emitted from a particular element when excited electrons return to the ground state, releasing energy as light in the process.
Dmitri Ivanovich Mendeleev O.S. 27 January was a Russian chemist and inventor. He formulated the Periodic Law, leading to the creation of this important document used by scientists around the world.
Electrons not found in the valence orbital are said to be this type of electron.
The earliest known scientist-philosopher to have theorized the existence of micro scale particles that make up matter. He called these particles "atomos"
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
The sum of the masses of the subatomic particles found in an atom - expressed in AMU.
This scientist laid the foundation for modern atomic theory. Through his electrolysis experiment, he determined that atoms combined to form molecules, and that elements cannot be broken down by chemical means.
This scientist conducted the Gold Foil Experiment, which proved that atoms contain a nucleus and are largely made up of empty space.
These type of electrons are found in the outermost orbital of an atom and are responsible for the reactivity of the atom as a whole.