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○ a The atomic number is 3 and the mass number is 7

The atomic number means the position of element on the periodic table.Lithium (Li) is the third element of periodic table, Henceforth making its atomic number 3.Mass number is the sum of number of Protons + Number of neutronsHere we have 3 Protons and 4 neutrons.

Neurons :- Neurons are the particles of atoms which do not carry any type of charge. As we can see in the diagram. The yellow particles are neutrons as they do not contain any charge.

Protons:- Protons are the positively charged parts of atom. Here we have 3 Protons.

The term incorporation refers to constitutional doctrine.

Explanation:

The first ten amendments of the USA are made applicable to the public through the constitutional doctrine. The supreme court decides to incorporate certain selected amendments rather than incorporating the entire amendment, this is called selective incorporation.

Although the ninth and tenth amendments are not incorporated and will never be and the ninth amendment interacts with the state law, on which the supreme court relies on while deciding cases. Also, before this doctrine, the Bill of rights was applicable only to the federal government and the court cases.