How many protons, neutrons, and electrons are there in a neutral atom of $\ce{^{60}Co}$ (cobalt-60)?

An electric field surrounds (a) the electric charge. (b) all the electrons. $(c)$ all the protons. (d) all of these

Which contributes more to an atom’s mass-electrons or protons? Which contributes more to an atom’s size?

Why is the transfer of electrons evidence of a chemical reaction? Use a molecular-level drawing in your explanation.

How many valence electrons does Na have when forming an ionic bond with Cl?

How many electrons does it take to make $80 \mu \mathrm{C}$ (microcoulombs) of charge?

What does the electron transport chain use the high-energy electrons from the Krebs cycle for?

What is the total charge of all the electrons in 1.0 kg of $\mathrm{H}_{2} \mathrm{O} ?$

Use the concept of de Broglie wavelengths for electrons to explain the allowed orbits in the Bohr model of the atom.

When filling degenerate orbits, electrons fill them singly first, with parallel spins is known as?

What is the maximum number of electrons that can fi ll the fi rst principal energy level?

State the number of electrons lost or gained when the Group 7A(17) element form ions.

How many electrons must be gained by each of the following atoms to achieve a stable electron configuration?

N

In what two ways can two atoms share electrons when forming a covalent bond?