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.

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Which of the following list the divisions of the geologic time scale in order from longest to shortest