Atomic and Nuclear Phenomena Crossword Puzzle

QUESTIONS LIST:

• photoelectric effect : a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
• hertz : what is the surname who discovered photoelectric effect in 1887
• max planck : he explained the wavelength distribution of black body radiation in 1900.
• albert einstein : a new corpuscular theory of light in which each particle of light contains a fixed amount of energy that depends on the light's frequency.
• half life : each nucleus has a 50% chance of living for a time equal to one _ .
• continuous : _ spectrum - it consists of all wavelengths within a certain range.
• radioactivity : the spontaneous breakdown of an unstable atomic nucleus accompanied by the emission of particles and rays.
• atomic spectra : the spectrum of the electromagnetic radiation emitted or absorbed by an electron during transitions between different energy levels within an atom.
• emission spectrum : formed by the frequencies of these emitted light.
• absorption : _ spectrum - it is constituted by the frequencies of light transmitted with dark bands
• philipp lenard : he demonstrated that electrically charged particles are liberated from a metal surface.
• alpha particles : composed of two protons and two neutrons; hence they are helium nuclei.
• decay : other term for 'daughter element'.
• gamma rays : are high-energy electromagnetic waves.
• beta particles : are electrons which have negative charges and travel at nearly the speed of light.