Answer:
<h2>(1)
. </h2><h2>(2).
</h2><h2>(3).
</h2><h2>(4).
</h2>
Explanation:
Cahn, Ingold, and Prelog formulated a rule to specify the arrangement of the atoms or groups that are present in an asymmetric molecule. This rule is called a Cahn-Ingold-Prelog system. This system is generally used in the R, S system of nomenclature.
According to this rule, such an atom that is directly linked to the asymmetric carbon atom is given the highest priority that has the highest atomic number. So here Nitrogen atom of molecule is given the highest priority because Nitrogen has 7 atomic numbers. Carbon atom of molecule has 6 atomic number. So it is given 2nd position. Deuterium and Hydrogen have 2 and 1 atomic numbers respectively so the are given 3rd and 4th order respectively.
Answer:
1. A
2. C
3. C
Explanation:
1. there are single cell organisms
2. all others are abiotic factors
3. individual is just one, population is one species, community is all populations, ecosystem includes abiotic and biotic factors, biome is a large geographical area.
Because different objects give out electromagnetic radiation at different frequencies. Some objects are very ea...
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Answer:The sample is 144 years old.
Explanation:We are given half life which is 72 years.