b. distribution.
c. conservation.
d. irrigation.
Answer: Option (c) is the correct answer.
Explanation:
When we avoid wastage of water or overuse of then then it is known as conservation of water.
For example, turning off tap when bucket placed below it is filled with water means avoiding wastage of water.
Whereas over flow of water from the bucket is wastage of water.
Thus, we can conclude that using less water is one way to practice water conservation.
b. Ne.
c. Ar.
d. Ni.
According to the electronic configuration, the element with 8 electrons in its 3 d sublevel is nickel.
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
Learn more about electronic configuration,here:
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The element with 8 electrons in its 3d sublevel is Ni, Nickel. The answer is letter D. The rest of the choices do not answer the question above.
b) krypton
c) uranium-235
d) none of the above