Question

which of the following is true when comparing protons and electrons?
o electrons have a positive charge and protons have a negative charge
o protons have a positive charge and electrons have a negative charge
o protons and electrons both have a positive charge
the mass of an atom depends on which of the following.
o protons only
o electrons only
o protons and neutrons
o protons and electrons
which of the following is true when discussing the structure of the atom?
o the nucleus is large and empty compared to the rest of the atom
o the nucleus is very small and tightly/closely packed with protons and neutrons
o the electron cloud is very empty and only has a few neutrons in it

Explanation:

• First question: Protons have a positive charge, electrons have a negative charge.
• Second question: The mass of an atom depends on protons and neutrons (as electrons have negligible mass compared to them).
• Third question: The nucleus is very small and tightly - packed with protons and neutrons (while the electron cloud is large but mostly empty space).

Answer:

• First question: protons have a positive charge and electrons have a negative charge.
• Second question: protons and neutrons.
• Third question: The nucleus is very small and tightly packed with protons and neutrons.