What is the meaning of valence electron?

What is the purpose of the lateral line

a solution contains 29.1g per litre of aluminium sulphate. calculate the number ofsulphate ions in 350cm^3 of the solution (Al=27, S=32, O=16)

1 kg of water (specific heat = 4184 J / (kg K)) is heated from freezing (0°C) to boiling (100°C). What is the change in thermal energy?

What's the difference between natural gas, coal, and biomass?

Newton's second law of motion is F=ma A net force of 60 N north acts on an object with a of 30 kg. Use Newton's second law of motion to calculate the amount of acceleration the object will experience.

A metal surface becomes dull because of continued abrasion. chemical or physical

What types of tissues build the digestive system?

Chemical bonds? A.) Combine compounds to form elements B.) Hold atoms together to form compounds C.) Are always covalent D.) Are always ionic

What is the smalles lt unit of copper that still maintained the characteristics of copper

Which terms identify types of chemical reactions? (1) decomposition and : sublimation (2) decomposition and synthesis (3) deposition and sublimation (4) deposition and synthesis