Question

choose all that are correct.
an electron...

□ ...has a mass of 1 gram.

□ ...a negligible mass.

□ ...is located in the empty space surrounding the nucleus.

□ ...is located in the nucleus.

□ ...has a charge of 1+.

□ ...has a mass of 1 amu.

□ ...has no charge.

□ ...has a charge of 1-.

Explanation:

• "…has a mass of 1 gram": Electrons have a very small mass (about \(9.11\times10^{-31}\) kg), not 1 gram. Incorrect.
• "…a negligible mass": The mass of an electron is much smaller than that of protons and neutrons, so it is negligible when considering atomic mass (which is mostly from protons and neutrons). Correct.
• "…is located in the empty space surrounding the nucleus": Electrons are found in electron clouds (orbitals) around the nucleus. Correct.
• "…is located in the nucleus": Protons and neutrons are in the nucleus, electrons are outside. Incorrect.
• "…has a charge of 1+": Electrons have a negative charge. Protons have 1+ charge. Incorrect.
• "…has a mass of 1 amu": 1 amu is approximately the mass of a proton or neutron. Electron mass is about \(5.486\times10^{-4}\) amu, negligible. Incorrect.
• "…has no charge": Neutrons have no charge, electrons have -1 charge. Incorrect.
• "…has a charge of 1-": Electrons have a charge of \(-1\) (or 1- in this context). Correct.

Answer:

-...a negligible mass.
-...is located in the empty space surrounding the nucleus.
-...has a charge of 1-.