Horrible chem test essays! Please help!?

Question

1. Explain how electron shielding affects the general trend in radii of atoms of e1ements going from left to right across a period in the periodic table.

2. Explain why hydrogen behaves differently from other elements, and give some examples of the kinds of compounds hydrogen forms.

3. A factory in your town uses cadmium as part of its manufacturing process. Due to recent economic conditions, cadmium is no longer available, and you must find a replacement. Suggest two elements that might be good replacements. Which of these would be your choice? Explain why.

4. Compare the role of nuclear fusion in the formation of Earth’s naturally occurring elements and in the creation of synthetic elements in the laboratory.

Answer 1

3) Zn and Ag.

Zn is in the same group as Cd and similar in properties. It is also eco-friendly. Ag is just before Cd in the same period and has similar properties.

Hg is a toxic element and should not be used.

The other answers can be found in textbooks.

Answer 2

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