Write the symbol for every chemical element that has atomic number less than 74 and atomic mass greater than 173.8u

Idon’t know how to solve this question

An observation that requires measurement is called quantitative observable or qualitative

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic