Which compound is formed from a network of bonded ions?

Atomic nuclei of almost all elements consist of

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.