An atom's valence electrons are those electrons that have the highest energy

True or False?

What is the difference between naoh (s) and naoh (aq) ?

What is an element considered a pure substance?

If an object has a density of 1.35 g/ml, will it float or sink in water?

Water droplets forming on the inside of a cold windshield is an example of Evaporation Conduction Vaporation Condensation

O2 would not be considered as a compound. True False

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer

20 Which statement describes a reversible reaction at equilibrium? (1) The activation energy of the forward reaction must equal the activation energy of the reverse reaction.

Count the total number of atoms in CaCO3: 2 3 4 5 6

Question #21TrueFalse The general name for a substance added to a reaction that affects the rate but is not consumed in the reaction is called a complex a. True b. False

what kinda energy is produced when a force causes a substance to vibrate, and the energy is transferred through the substance in a wave.