If a substance changes its shape and size, is it a physical or chemical change? - chemical - physical - both

Which atom (Ba or I) would accept electrons from the other atom to satisfy the octet rule?

How many grams of magnesium oxide can be produced when 125 g Mg react with 102 g O2? Unbalanced equation: Mg + O2 → MgO Show, or explain, all of your work along with the final answer.

Each atom of protium has one proton, no neutrons, and one electron. Each atom of deutrium has one proton, two neutrons, and one electron. Are these the same or different elements? Why?

Hydroelectric energy comes from

What does the term chemistry mean?

Which has more kinetic energy, a small sports car traveling at 30 km/hr or a large tractor-trailer traveling at 75 km/hr?

A Lay's potato chip weighing 4.03g is put into a bomb calorimeter containing 895.5g of water at 25.10°C. If this increases the temperature of the surrounding water to 48.89°C, what is the amount of calories per serving if 1 serving = 28.38g.

Which element is the least metallic between cadmium, silver, zinc, or iron?

Describe the motion of molecules in an ice cube an in a radiator in winter

True or False. Heat is always transferred from warmer objects to cooler objects.