4 The line segment on the map below is 1.6 cm long, and the map scale is 1 cm = 0.5 km. What is the gradient of the slope marked by the line? A. 600 m/km
B. 1,333 m/km
C. 750 m/km
D 500 m/km

Which of these is most likely a characteristic of a non-radioactive daughter isotope after it is form from the parent isotope a . stable electron’s b. stable nucleus c. positively charged atom d. negatively charged atom