Why the thrusters only slowed the pod, it did not stop, so the pod hit the space station and made it bounce and move in the opposite direction?

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?