B. Carbon
C. Methane
D. Water
Carbon is the substance can not be decomposed by a chemical change. Therefore, option B is correct.
A chemical change is the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances. It occurs when one substance reacts with another to form a new substance.
Carbon and water Although carbon dioxide and carbonic acid are simpler compounds, they are still compounds. As a result, they can decompose and leave us with the basic elements' hydrogen, oxygen, and carbon. Compounds degrade due to chemical changes.
Elements are pure substances that cannot be broken down using conventional chemical methods such as heating, electrolysis, or reaction. Elements include gold, carbon, silver, and oxygen.
Thus, option B is correct.
To learn more about the chemical change, follow the link;
#SPJ6
B) Mixtures cannot be separated by physical means.
C) Mixtures consist of only one kind of atom.
D) Mixtures have to or more substances mixed together, but are not chemically combined.
same number of outermost electrons
B.
same number of protons
C.
similar atomic masses
D.
similar atomic numbers
(4) L and R
Answer:
1. A and G
Explanation:
Change in colour as well as liberating gas are the evidences that chemical reaction or change taken place.
The change in colour of the solution provides us information or evidence is that chemical change has taken place. There are many other ways which provides evidence of taking place of chemical change is the release of gas from the solution after adding powder or any substance.
There are some reactions in which new substance is formed which is also an identification of chemical change so we can conclude that change in colour as well as liberating gas are the evidences that chemical reaction or change taken place.
Learn more: brainly.com/question/12017204
D.All of above. Hope it helps!!!