Many people are proponents of using nuclear power instead of burning coal to generate electricity. What is an environmental disadvantage of using nuclear power?

A) Water vapor is released from the cooling towers.
B) Radioactive wastes must be stored for long periods.
C) Less carbon dioxide would be released into the atmosphere.
D) Small amounts of uranium can produce large amounts of energy.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?