When salt is formed from positively charged sodium and negatively charged chlorine, the charge on the salt becomes positive?

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

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

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