What is the total number of neutrons in an
atom of Li?
A. 7
B. 10
C. 3
D. 4

Explanation:

The neutrons in an element can be found by subtracting the atomic number from the atomic mass.

Li is the symbol for lithium.

This element has an atomic mass of 6.941, which we can round to 7.

Lithium's atomic number is 3.

Lithium has a total number of 4 neutrons.

D)4

Explanation:

Lithium is an alkali metal with the atomic number = 3 and an atomic mass of 6.941 g/mol. This means that lithium has 3 protons, 3 electrons and 4 neutrons (6.941 - 3 = ~4).

the dissolution of polymer can be thermodynamically described in 2 steps.