3 clues that indicate a chemical change
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Light, heat or sound is released.
Change of color or odor through the formation of gases.
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The physicals properties of a substance can be used to identify the substance, because_____. Select all that apply.at any given location, the physical properties of a substance do not changewhen the substances are chemically reacted the physical properties remain the sameeach substance has a unique set of physical propertiesno two substances have any of the same properties
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Light of certain energy shines on a metal and causes electrons to be emitted. Based on the research of Albert Einstein, the change that would most likely result in stopping the emission of electrons from this metal is to coat the metal.
your answer is: the use of that light has a lower frequency
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Ideal Gas Law:
pressure * volume = (number of moles of gas) * (0.08206) * (temperature)
or short-hand:
PV = nRT
this equation can be transformed to solve for temperature as:
T = PV / nR
given there is no change in pressure and the volume of the container has increased, we know the temperature increases because volume is in the numerator--a larger number on top reflects an overall greater number.
B) It has increased slightly
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reactivity
valence electrons
atomic radii
atomic mass
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Explanation:
When we move down a group then there will be increase in number of shells present in an atom. Due to this there will be increase in atomic radii of the atom.
As a result, there will be increase in atomic mass of the atom also. Whereas reactivity of metals increases on moving down the group as the valence shell moves away from the nucleus. So, it becomes easy for the metal atom to lose an electron.
On the other hand, reactivity of non-metals decreases on moving down the group.
So, we can conclude that properties increase when moving down a group of the periodic table are atomic radii and atomic mass.
Atomic Mass.
Reactivity decreases as you go down a group.
Atomic Radius also decreases as you go down a group.
Valence electrons are the same within a group.
Atomic mass, however, increases as you go down a group.
Hope this helps!