Science Chapter 13 Atom words and questions
Terms in this set (16)
The smallest unit of electric charge that is possible in ordinary matter; represented by the lower case letter "e."
A particle with an electric charge (-e) found inside of atoms but outside the nucleus
The tiny core at the center of an atom containing most of the atoms mass and all of it positive charge
A particle found in the nucleus with a positive charge exactly equal and opposite to the electron
a particle found in the nucleus with mass similar to the proton but with zero electric charge.
the number of protons in the nucleus of an atom. The atomic number determines what element that the atom represents.
Atoms of the same element that have different numbers of neutrons in the nucleus
The number of protons plus the numbers of neutrons in the nucleus
a nucleus is stable if it stays to together
a nucleus is radioactive if it spontaneously breaks, emitting particles or energy ion the process.
The characteristic colors of light given off or absorbed by an element.
A bright colored line in a spectrascope
An instrument that separates light into a spectrum
One of the discreet allowed energies for electrons in an atom
The theory that describes matter and energy at small (atomic) sizes.
It is impossible to know variables exactly in the quantum world