A chemical reaction is a reaction that forms a new substance and it is also a reaction that s permanent ( you cannot reverse)
Answer:
Anion is negatively charged particle.
Calcium +2. Its cation
Oxygen -2
Explanation:
An anion is a charged particle with a negative charge. Anions has charge of -1
Oxygen require two electrons to complete its octet and hence its charge is -2
Calcium is a cation and has a positive charge of +2
Answer:
homogeneous mixture means the mixture that we can't see with our naked eyes and hetergenous mixture means the particle which can't be seen with our naked eyes.
Bond length increases because single bond is longer than double bond and strength decreases
Answer:
The correct option is A
Explanation:
Water from a river is used for many activities in a community. These activities could include (but not limited to) tourism, drinking for animals, local transport, irrigation for nearby farming, recreation (as in swimming), habitat for some living organisms among others. Rivers are not limited by what limits the influence of oceans such as taste (it's saltiness, which cannot be used in farming also) and wave current.