which of the following statements is true according to modern atomic theory?select one:a.atoms may be divided in ordinary chemical reactions.b.cathode rays are composed of protons.c.atoms can never combine with any other atoms.d.atoms of the same element may have different masses.

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15-11-2022
Chemistry

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which of the following statements is true according to modern atomic theory?select one:a.atoms may be divided in ordinary chemical reactions.b.cathode rays are composed of protons.c.atoms can never combine with any other atoms.d.atoms of the same element may have different masses.

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myrakincsem myrakincsem · Answer 1 · 2022-11-19T11:22:16+01:00

According to the modern atomic theory, the statement that is true is that b.cathode rays are composed of protons.

One similarity of cathode rays and anode rays is that both move in straight lines. But the particles in cathode rays are negatively charged and they are electrons while those in anode rays are positively charged and they are protons.

Thus it was concluded that when the air was pumped, the protons moved in straight lines from cathode to anode. These were referred to as the cathode rays. After reaching the anode, it moved after the anode and hit the back of the tube wall. This caused fluorescence to occur. Later, J J Thomson made the conclusion that the cathode rays are negative and referred to them as electrons.

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