4. How do the atomic numbers of the elements

within each of Groups 1, 2, and 13-18 of the

periodic table vary?

8. The level of the water in the open aquarium tank goes down each day. Why?

What is the chemical equation for CaCl2 dissolved in water?

Order the materials/substances from lowest specific heat to the highest specific heat. Materials/substance: Diamond-.510, Water-4.186, Copper-.386, Air - 1.03

Using the periodic table entry below, match the phrases with their corresponding values. 1. number of protons 8 2. atomic mass 19 3. number of electrons in the n = 1 shell 2 4. number of electrons in the n = 3 shell 20 5. number of neutrons 39

What is the [H+] concentration of a solution whose pOH is 12.40?

Peter is 5 ft, 11 inches tall. Paul is 176 cm tall. Who is taller?

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks