A phosphorus atom gains three electrons to form a phosphide anion when forming a chemical bond to a metal I believe
Answer:
In a chemical change the nature of the substance changes and it is transformed, for example when a piece of wood is burned, the carbon is being transformed into carbon dioxide. A physical change is one where the nature of matter does not vary.
I hpoe help you.
Answer:
Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.
Here are the solutions
1. Double replacement
2. Combustion
3. Single replacement
4. Synthesis
5. Decomposition.
