Answer:
Because it is made up of different minerals which are chemically combined.
Explanation:
Explanation:
A chemical reaction is defined as the reaction which leads to change in chemical composition of the reactants due to which there occurs formation of a new compound.
For example, when Ethan heats a substance and observes that the substance turns from a brown solid to a black powder then it means heating has lead to a chemical change in the brown solid because of which it has turned into a black powder.
Whereas if there occurs no change in chemical composition of the reactants then we can say that a physical change has occurred.
For example, change in shape, size, mass etc of a substance are all physical changes.
Hence, we can conclude that Ethan best defend his conclusion as a chemical change.
Answer:
The Lewis structure of CH3OCH3 is dimethyl ether, the simplest ether in existence
Explanation:
Answer:
The principal quantum number, n, determines the energy level of the electron in an atom. There are n2 orbitals for each energy level. So for n = 3 there are nine orbitals, and for n = 4 there are 16 orbitals.
