The atomic number of an element is 19. Which is true of this element?

A.

Each atom has an atomic mass of 19.

B.

Each atom has 19 neutrons.

C.

Each atom has 19 protons.

D.

Each atom forms 19 ions.

If a gas has a gage pressure or 156 kPa, it's absolute pressure is approximately A. 56 kPa. B. 100 kPa. C. 256 kPa. D. 300 kPa.

If there is motion, then a force in acting true or false

If you place a free electron and a free proton in the same electric field, how will the forces acting on them compare? 82. How will the accelerations of the proton and the electron in the preceding problem compare? 83.

Suppose you have a 148-kg wooden crate resting on a wood floor. (a) what maximum force (in n) can you exert horizontally on the crate without moving it?

A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the persons hand at - 5.0 m/s, what was the velocity on impact?

What countries will see the solar eclipse?

Water is a compound. O A. True B. False

How do air quality scientists ensure the air is cleaned? What steps do they take?

Is a mirrors surface opaque or transparent or translucent?

Sound waves can combine to become bigger or smaller true or false