What is the best replacement for ‘tin’ on the period table?

(Name A Element)

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

Which of the following isotopes has the same number of neutrons as phosphorus-31?