Choose the statement that best describes a step in the formation of an ionic bond.

a.) an attraction occurs between two ions that have the same charge.
b.) a metal atom forms a cation, and a nonmetal atom forms an anion.
c.) a more electronegative atom transfers electrons to a less electronegative atom.
d.) a metal pulls electrons from another metal and produces a force of attraction.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

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

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous