How does a lithium cation compare to a lithium atom? the cation is larger. the cation has the same radius. the cation is smaller. the cation has the same charge

Based on the position vs. time graph which velocity vs. time graph would correspond to the data

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?