What did Rutherford's famous scattering experiment help to prove in his day?
The nucleus of an atom is positively charged, Rutherford said, because the ionized helium atoms (alpha particles, which he proved were ionized helium) were scattered off of the target nuclei. They must be the same charge, which Rutherford decided as positive.
You might also like to view...
Neglecting friction, a small and a large block of ice begin sliding down an incline together. The larger block reaches the bottom
A) before the small block. B) after the small block. C) at the same time as the small block.
A Lagrange point in the Earth—Moon system is a position
A) directly between the Earth and Moon B) on the surface of the Moon that points directly away from the Earth C) on the Earth's surface that the Moon's gravity is concentrated D) in space where the effects of the Earth's and Moon's gravity cancel each other out
A lens of focal length 30.0 cm is made of a material with index of refraction 1.50 . What is the focal length of a lens with the same geometry but is made of material with an index of refraction 2.00?
a. 40.0 cm c. 15.0 cm b. 60.0 cm d. 22.5 cm
During precipitation-hardening, at peak strength the precipitate changes from coherent to _________.
Fill in the blank(s) with the appropriate word(s).