Question

13 multiple choice 1 point the smallest part and building block of matter is called the quark molecule cell atom 14 multiple choice 1 point how many electrons can the 2nd electron shell surrounding the nucleus of the atom hold? 32 electrons 8 electrons 18 electrons 2 electrons

Explanation:

1. An atom is the smallest part and building - block of matter. Quarks are smaller particles that make up protons and neutrons in the nucleus of an atom, but atom is the basic unit of matter. Molecules are made up of atoms, and cells are the basic unit of life, not matter.
2. The formula for the maximum number of electrons in an electron shell is \(2n^{2}\), where \(n\) is the shell number. For the second shell (\(n = 2\)), \(2\times2^{2}=8\).

Answer:

1. D. atom
2. B. 8 electrons