shymitch32
29.07.2019 •
Chemistry
Uranium is a metallic element that is used in nuclear reactors and nuclear weapons. the vast majority of uranium found on earth is in the form of uranium-238, an isotope with a mass number of 238, while the uranium that is used for nuclear reactors and weapons is uranium-235, an isotope with a mass number of 235. what is the atomic difference between uranium-235 and uranium-238? uranium-235 has three fewer protons than uranium-238. uranium-235 has three fewer neutrons than uranium-238. uranium-235 has three fewer electrons than uranium-238. uranium-235 has three fewer atoms than uranium-238.
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Ответ:
the atomic difference between uranium-235 and uranium-238 is that uranium-235 has three fewer neutrons than uranium-238
Isotopes are atoms of the same elements which are only different in their amount of neutrons. That difference in the number of neutrons gives them different masses. Some isotopes are unstable, and they release neutrons (radiation) to transform into other, more stable, isotopes. When this happens the isotope is called a "radioactive isotope".
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Ответ:
Metals are malleable.
Explanation:
The metals are the substances possessing an abundant amount of electrons. They are placed majorly on the left side of the periodic table. The metals are considered as the good conductors of electricity and heat, they are lustrous in appearance, and usually have a high melting point. However, the main property, which distinguishes it from other substances is that they are malleable and ductile, that is, they can be transformed into wires and thin sheets.