click below
click below
Normal Size Small Size show me how
Chemistry stack 01
chapter 5 vocabulary
Question | Answer |
---|---|
what is an atom? | a tiny indivisible particle |
what is an isotope? | atom with same number of protons and electrons, but different number of neutrons. |
what is radiation? | process in which substances spontaneously emit radiation |
what is a neutron? | an uncharged elementary particle that has a mass nearly equal to that of the proton |
what is wavelength? | the distance in the line of advance of a wave from any one point to the next point of corresponding phase |
what is frequency? | the number of times that a periodic function repeats the same sequence of values during a unit variation of the independent variable |
what is amplitude? | the maximum departure of the value of an alternating current or wave from the average value |
what is quantum? | any of the small subdivisions of a quantized physical magnitude (as magnetic moment) |
what is photon? | a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter |