The mass of an electron is _. What is it?

A) Higher than the mass of the proton or the neutron

B) Not significant to the overall mass of the atom

C) equal to the mass of the proton and the neutron

Several students in the group made comments to the coach about the back pack. which student has the correct analysis of the forces and motion of the back pack?

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.