Answer:
D. 
Explanation:
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Oxygen has a total number of eight (8) electrons and as such the is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon that has a total number of ten (10) electrons.
Hence, contains the same number of electrons as an atom of neon.
Explanation:
1st one will be cathodic reaction and reduction will occur since electrons are being gained and hydrogen goes from +1 to zero oxidation state.
2nd one will be anodix reaction and oxidation will take place because Iodide ion's oxidation number increases from -1 to 0
Cl2 means two Cl or chlorine atoms bonded two each other. 2Cl means t who separate chairing atoms.
The environment modifies.
Explanation:
A modification of the environment can lead to population changes overtime. The environment is very important for population dynamics.
It is predominantly made up of the factors that affects organisms and where they live.
If the resources in an environment gets depleted, organisms will be force to migrate from that place to another in search of more nutrient areas.
This and many other factor like climate, stability, etc causes changes to the population through time.
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