Answer: What are the numbers of valence electrons for each atom?
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
The cations and anions combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral ionic compound.
The oxidation states are known by their ability to gain or lose electrons which is decided by the number of valence electrons.
Answer:
All
Explanation:
You would need carbon dioxide to be able to sustain life forms such as plants, warm enough temperatures to allow the development of animals, (because they cannot be frozen), they would, of course, need oxygen to allow anyone to breathe, and finally liquid water to sustain healthy life, because we must hydrate that is necessary for survival.
Well there alot of challenges faced by biologist researchers during the research of infectious disease, however major of those include the followings:1- Defining and measuring the fitness for pathogens across the scales2- Developing models to capture the impact of co-infection on the evolutionary process3- Modeling how pathogen characteristics shape the evolution of hose immune diversity4- Understanding the maintenance of pathogen diversity5- Developing the better models for the impact of genetic systems on pathogen evolution .
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-Payshence xoxo
Xylem is the answer......
Hola!
Geographic Isolation prevents the cross breeding between the populations that have been separated by the isolation.
Without the separation the two growing population would be brought closer together and members of the two populations will cross breed.
♦ Example:
There are two populations of squirrels on either side of the grand canyon.
↑↑↑
These populations are considered two different species.
We can conclude that these 2 populations were once one population.
Isolation allowed the two populations to move apart and speciation occurred.
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