False. Metals such as gold/ silver even aluminium are shiny because they reflect light.
Answer: the picture is work for number 1,2,4,5,7
Explanation: number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.
number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.
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Hello!</h2>
The answer is: The starting materials in a chemical reaction are called reactants... or can be called reagents too.
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Why?</h2>
The principal component in a chemical reaction are the reactants, after the reaction, we have the products and we could have reactants too (if they are not completed consumed).
For example, given the following reaction:

Reactants are: 2C2H6 and 7O2
Products are: 4CO2 and 6H2O
Have a nice day!
Answer:
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
What are the calculation like answer