Question

question 1 the molecular weight of an atom is the total combined weight of which two particles?
○ electrons and neutrons
○ neutron and protons
○ protons and electrons
question 2 what particle in an atom has a negative charge?
○ neutron
○ electron
○ proton

Explanation:

Question 1

The mass of an atom (molecular weight here, more accurately atomic mass) is mainly from protons and neutrons as electrons have negligible mass. The correct option is "neutron and protons" (note: typo, should be "neutrons and protons" but among the options, this is the intended one).

Electrons are negatively charged, neutrons are neutral, protons are positive. So the particle with negative charge is electron.

Answer:

B. neutron and protons (assuming options are labeled A, B, C as: A. electrons and neutrons, B. neutron and protons, C. protons and electrons)

Question 2