An element can be identified by . the number of its isotopes

the number of protons in its atom

its mass number

the number of neutrons in its atom

True or false a high force means an object is moving fast100 points!

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Could someone . i have tried to solve myself but my calculation is off