Which statement is true about two isotopes of the same element?

a. they have the same mass number.
b. they have different numbers of protons.
c. they have different locations on the periodic table.
d. they have different numbers of neutrons.

the answer is

D. They have different numbers of neutrons.

Explanation:

small = small current large mag large current

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.