Physics
Physics, 13.10.2019 23:30, MannyRaw55

Which event best becquerel determine uranium radiate rays?

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Chemistry, 16.09.2019 07:00, Playboycxm
I'm kinda in a rush but take your time! thx! 1.what was henri becquerel studying when he accidentally discovered radioactivity? a.photography b.properties of black light c.properties of x-rays d.solar energy 2.when marie curie isolated uranium from pitchblende, she realized that the pitchblende was more radioactive than the uranium she had extracted. what did she conclude about her observations? a.pitchblende itself is a radioactive element b.the pitchblende sample contained an unknown radioactive element c.the pitchblende sample was defective d.pitchblende should be used as radiation therapy 3.henri becquerel's original hypothesis was that fluorescent minerals became excited by a solar energy and gave off x-rays. however, after he discovered uranium minerals emitted their own radiation without the of solar energy, he abandoned his hypothesis. why did becquerel abandon his first hypothesis? a.he was afraid of ridicule from the scientific community for being wrong b.he found new evidence that didn't support his original hypothesis c.he couldn't repeat the results in multiple experiments. d.he couldn't make the experiment work, so he came up with a new plan 4.marie curie had many "firsts". which of the following is not one of marie curie's firsts? a.first female nobel prize winner b.first female professor in the faculty of sciences c.first to suggest that atoms can change d.first to discover x-rays my answers: 1.d 2.b 3.a 4.d
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Chemistry, 02.11.2019 11:31, dontworry48
Which event best becquerel determine uranium radiates rays? a cloudy day a substance glowing in the dark wrapping of ore in paper exposure of a photographic plate
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Chemistry, 02.11.2019 17:42, TheGuavaMaster
Which describes the experiments of becquerel and the curies? a. becquerel showed that uranium requires x-rays to form radiation, and the curies coined the term “radioactivity.” b. becquerel coined the term “radioactivity,” and the curies showed that uranium requires x-rays to form radiation. c. becquerel discovered other radioactive elements, and the curies showed that uranium gave off radioactivity. d. becquerel showed that uranium gave off radioactivity, and the curies discovered other radioactive elements.
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