The atomic number of an atom is always equal to the number of its

(1) protons, only (2) neutrons, only (3) protons plus neutrons (4) protons plus electrons

What is a catalyst defined as? a. a substance that speeds up a reaction only b. a substance that speeds up a reaction, and is not used up c. a substance that speeds up a reaction, and is completely used up d.

Calculate the average net charge on phenylalanine if it is in a solution that has a ph of 8.70.

What type of rock is the Thornton Quarry made of?

How can evidence from an experiment be explained in relationship to the hypothesis? as a prediction as a question as an inference as a conclusion

Calcium carbide can be made by heating calcium oxide with carbon. How many kj of heat are absorbed in the reaction?

When a 1 kg ball is dropped from the roof of a building its speed increases from 0 m/s to 10 m/s just before it hits the ground. What is the ball's change in Kinetic Energy at its maximum (fastest) speed?

What are the characteristics of a substance in the liquid state? answers: A: made up of particles packed closely together, having both definite shape and definite volume B: made up of particles packed relatively close together, having an indefinite

What happens to the equilibrium if the pressure is increased?

Which of the following colors of visible light has the lowest energy? A) blue B) green C) red D) yellow

All are true about how does gravity aid erosion except? Gravity causes rocks to fall and break apart. Gravity causes rocks to get larger then breaks it apart. Gravity pulls rainwater down eroding rocks.