91影视

What does it mean for something to have wavelike properties? Particulate properties? Electromagnetic radiation can be discussed in terms of both particles and waves. Explain the experimental verification for each of these views.

Defend and criticize Bohr鈥檚 model. Why was it reasonable that such a model was proposed, and what evidence was there that it 鈥渨orks鈥�? Why do we no longer 鈥渂elieve鈥� in it?

Which has the larger second ionization energy, lithium or beryllium? Why?

Explain why a graph of ionization energy versus atomic number (across a row) is not linear. Where are the exceptions? Why are there exceptions?

Account for the fact that the line that separates the metals from the nonmetals on the periodic table is diagonal downward to the right instead of horizontal or vertical.

Make sense of the fact that metals tend to lose electrons and nonmetals tend to gain electrons

Explain electron from a quantum mechanical perspective, including a discussion of atomic radii, probabilities, and orbitals.

Which is larger, the H 1s orbital or the Li 1s orbital? Why? Which has the larger radius, the H atom or the Li atom? Why?

There are an infinite number of allowed electronic transitions in the hydrogen atom. Why don鈥檛 we see more lines in the hydrogen emission spectrum?

Explain what is meant by the term 鈥渆xcited state鈥� as it applies to an electron. Is an electron in an excited state higher or lower in energy than an electron in the ground state? Is an electron in an excited state more or less stable than an electron in the ground state?