Draw the Lewis structure for CCl4 on scratch paper. Then submit answers to the following 2 questions, to be graded: A) How many lone pairs are there on the central (C) atom?

B) How many lone pairs are there on ONE of the Cl atoms?

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.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange