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CHemistry Chapter 4

JJ Thompson Experiment is the Cathode created in 1897.
How JJ Thompson knew the ray was composed of negatively charged particles. Cathode are deflected by a magnetic field in the same way a wire carrying an electric current which is known to have a negative charge.
The presence of a negatively charged particle within a neutral structure such as the atom is an indication of what? The rays are deflected away from a negatively charged object.
Elements are composed of tiny particles called? Atoms
Atoms of any element are____ from those of any other element. Different
Atoms of different elements can form ___ by combining in whole-number rations. Compounds
Chemical reactions occur when atoms are? Separated, joined, or arranged.
Atoms of one element change into atoms of another element during chemical reactions. Always true, never true, sometimes true. NT
Atoms combine in one-to-one ratios to form compounds. AT,NT, ST ST
Atoms of one element are different from atoms of other elements. AT, NT, ST AT
Atom the smallest particle of an element that retains its identity in a chemical reactions.
Scanning Tunneling microscope an instrument used to generate images of individual atoms.
John Dalton English chemist and schoolteacher who formulated a theory to describe the structure and chemical reactivity of matter in terms of atoms.
Created by: taytay6161



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