Which pair of species have the most nearly

identical atomic and molecular properties?

1. 35/17Cl and 80/35Br

2. 7/3Li and 9/4Be

3. 23/11Na and 23/11Na+

4. 19/9F and 19/9F-

5. 12/6C and 13/6C

Definition of excretory

How many grams of oxygen are in 4.5 moles of hno3

How many grams of potassium iodide will produce 500 grams of silver iodide, when there is an excess of silver nitrate? Why? A. 235 B. 707g C. 166g D. 301g

Why is the nitrogen cycle more complicated than the water cycle or the carbon cycle?

The balance of nature depends on the food chain. true or False

Does density of water depend on the amount of water present?

Which of the following air fronts does not move? a Occluded front b Cold front c Stationary front d Warm front

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?

Read the two questions. Question 1: Should acid precipitation be a concern for the new age environmentalist? Question 2: Does acid precipitation in forests affect the reproduction rate in birds?