How many protons does this atom have?

How many neutrons does this atom have?

How many electrons does this atom have?

When you rub a glass rod with a piece of silk, the glass rod becomes positively charged?

Two stones are launched from the top of a tall building. One stone is thrown in a direction 25.0cm above the horizontal with a speed of 18.0 m/s; the other is thrown in a direction 25.0cm below the horizontal with the same speed.

The surface gravity on jupiter is about three times as much as the surface gravity on earth. this means

A 60 kg rower is paddling a 30 kg canoe with a 2 kg paddle at a constant speed of + 10 m/s. If she loses her grip on the paddle and it flies backward with a velocity of - 20 m/s, what is the final momentum of the boat and rower?

Describe what are sex cells?

Why do different elements emit different colors of light

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a