The atomic and mass numbers for four different atoms are given below. which two are isotopes of the same element? (2 points)

atom

atomic number

mass number

a

100

257

b

101

259

c

101

260

d

102

259

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Answer explain why it is not possible to deduce a complete order of reactivity.

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.