Question

part b which of these relationships is true of an uncharged atom? options: the atomic mass is equal to the number of electrons. the number of protons is equal to the number of electrons. the number of electrons is equal to the number of neutrons. the atomic mass is equal to the atomic number. the number of neutrons is equal to the number of protons. part c what determines the types of chemical reactions that an atom participates in? the number of electrons in the outermost electron shell

Explanation:

For an uncharged atom, the number of protons (positive charge) must equal the number of electrons (negative charge) to balance the charge. Let's analyze each option:

• "The atomic mass is equal to the number of electrons": Atomic mass is protons + neutrons, not related to electrons. Eliminate.
• "The number of protons is equal to the number of electrons": This is true for uncharged atoms (neutral charge).
• "The number of electrons is equal to the number of neutrons": No inherent relation between electrons and neutrons in neutral atoms. Eliminate.
• "The atomic mass is equal to the atomic number": Atomic mass ≈ protons + neutrons, atomic number = protons. Not equal. Eliminate.
• "The number of neutrons is equal to the number of protons": Not always true (e.g., isotopes). Eliminate.

Answer:

The number of protons is equal to the number of electrons.