Indicated by formation of a gas, precipitate, release of heat, or a color change

Which group of elements are the most reactive

What is a temperature scale used by scienctist?

2. How do elements move from one phase to another? Give an example.

Select the correct answer. How does an atom become a positively charged ion? A. By gaining one or more electrons B. By gaining one or more neutrons C. By losing one or more electrons D. By losing one or more neutrons

What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of cr2o3 with 8.00 g of aluminum according to the chemical equation below? 2al + cr2o3 - -> al2o3 + 2cr?

Heating devices can be made by passing an electric current through a conductor of: high resistance low resistance high conductivity low conductivity

What is the element 3O2 name

Why sulphur used for food preservation?

How would a solution that is labeled 5.0 molar be similar to one labeled 5.0 molal?

Calculate the percentage by mass of nitrogen in ptcl2 (nh3) 2.