The atomic mass of an element is equal to the number of:

protons

protons plus neutrons

protons plus electrons

o neutrons

What is the name for temperature changes which involve no heat transfer?

Which of the following will stay constant, no matter is the substance is in a solid, liquid, or gas states

If you leave a solar powered flashlight in the sun for 8 hours, it will be able to stay lit for 3 hours. What would happen if you placed the flashlight under a bright light bulb for 8 hours?

How many electrons are present if a bromine ion has a charge of - 1

A species that changes the rate of a reaction but is neither consumed nor changed is A. A catalyst. B. An activated complex. C. An intermediate. D. A reactant.

Which statement best explains the plateau seen in the cooling curve of naphthalene? A) The energy of the system decreases B) The temperature of the system increases C) the temperature of the system decreases D) The energy of the system remains

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

The surface of the earth is divided into more than 50 large plates

What is the net ionic equation for AgNO3 (aq) + K2SO3 (aq) ?

Oil and water a combined to make salad dressing. Physical Change? Chemical Change? Both?