Because the formation of rust is a kind of chemistry reaction.
After chemistry reaction, compound with new properties is produced.
Of course, color is one of the new properties.
For example, if you put iron in colorless acid solution, a green solution is made.
This kind of chemisty reaction differs from physical reaction, for example, pigment with one color dissolves in liquid, a liquid with same color is made.
Answer:
a
Explanation:
from pH of 0-6 is acidic and 7 is neutral above 7 is basic or alkali
Answer:
–2
Explanation:
Data obtained from the question:
Number of electron = 16
Valence electron = 6
Now, let us write the electronic configuration for sulphur. This is illustrated below:
1s2 2s22p6 3s23p4
From the above, we can see that sulphur will be needing 2 extra electrons to complete its octet configuration. Therefore, the oxidation number of the sulphur will be –2.
The minus sign indicate that the sulphur will accept 2 electrons to complete its octet configuration
1.Heat:Heat can cause rock to melt,forcing real changes in its chemical and physical makeup;forcing some elemental components to chemically react with each other,both internal and external,chemical components to form entirely new material.
another way is erosion
