Question

6 c carbon 12.011 according to the image, the atomic mass of carbon is 12.011. how is the atomic mass of carbon, or any other element, determined? a) by adding the number of protons and the number of electrons b) by adding the number of protons and the number of neutrons c) by adding the number of protons, the number of neutrons, and the number of electrons d) by identifying the number of protons question 2 (5 points) listen the process by which a body of hot magma intrudes into a region of cold rock near

Explanation:

To determine the atomic mass of an element, we need to recall the composition of an atom's nucleus. The atomic mass is primarily contributed by protons and neutrons (since electrons have negligible mass). Protons and neutrons are located in the nucleus, and their sum gives the mass number (which is close to the atomic mass for most elements, accounting for isotopic abundances in the case of atomic mass).

• Option A: Adding protons and electrons is incorrect because electrons have negligible mass and do not contribute significantly to atomic mass.
• Option B: Adding the number of protons and neutrons is correct. Protons and neutrons have significant mass (each approximately 1 atomic mass unit), so their sum gives the mass number, which is the basis for atomic mass (adjusted for isotopes in the case of average atomic mass).
• Option C: Adding protons, neutrons, and electrons is incorrect because electrons' mass is negligible and not a factor in atomic mass.
• Option D: Identifying only the number of protons (atomic number) does not give atomic mass, as atomic mass depends on both protons and neutrons.

Answer:

B) By adding the number of protons and the number of neutrons