<span>Atoms move at different speeds depending on whether they are in liquids or solids </span><span>because the atoms or particles in solids are closely bonded while they are loosely bonded in liquids.
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</span><span>The attractive forces between the particles are so high that they remain in fixed positions. The particles, then, cannot slip over the neighbors particles. They can only vibrate. That is why solids have definite form and volume.</span><span />
<span>That the particles in liquids are loosely bonded means that the attractive forces are less compared with solids. Then the partilces can move and pass each other. They are not in fixed arrangements any more. Yet the particles are attracted to each other, so they have definite volume, although they take the form of the vessel, and they can flow.
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Answer:
elment ? atómic 71⁰349⁹⁰291
An exothermic reaction is a type of reaction that dissipates heat as the reaction proceeds. This would mean that in a closed system, when a reaction proceeds and is endothermic, the temperature of the solution or the system would increase so as to maintain the equilibrium with the whole system.
Answer:2,8,18,7,3
Strontium has 38 electrons, adding up those numbers should make 38
Explanation:
The normal electronic configuration of strontium is 2,8,18,8,2, during excitation 1 electron is lost to the outermost shell from the inner shell carrying 8 electrons.
The proton number of an element corresponds with its electronic configuration, the electron at the outermost shell determines how reactive such element will be.
Most alkali metals are very reactive metals which strontium is one