Worksheet: Development of Atomic Theory Name _
True-False: put a T for True and F for False to the right of each statement
Dalton's atomic theory stated:
atoms are indivisible.
all atoms of the same element are alike.
atoms unite in small, whole number ratios
to form compounds.
The Greek philosopher Democritus was one of the first to suggest the existence of atoms.
The word "atom" means invisible.
A theory is an explanation of observable facts and phenomena.
Aristotle supported the idea of the atom.
From the "gold-foil" experiment it was concluded that the atom is mostly empty space.
Short Answer and Fill in the Blanks:
What must models and theories do in order to remain valid?
a.
b.
The "gold-foil" experiment had the following results: of the alpha particles were deflected, of the alpha particles were reflected, and of the alpha particles passed through the gold foil.
Answers: 3
Chemistry, 21.06.2019 20:30
Un cierto gas tiene un volumen de 800ml a 80°c y 600ml a 80°c y 600mmhg de presión. ¿cual será el volumen del gas a condiciones normales? sà el gas es oxÃgeno, ¿cuál será su peso? y ¿cuántas moléculas están presentes en el sistema?
Answers: 2
Chemistry, 22.06.2019 17:20
The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.
Answers: 2
Chemistry, 23.06.2019 02:00
As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave
Answers: 2
Chemistry, 23.06.2019 06:00
Give one example of a pure (exact) number and of an estimated (measured) number.
Answers: 2
Worksheet: Development of Atomic Theory Name _
True-False: put a T for True and F for False to the...
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