What pair of elements have the same number of valence electrons? a) Li and Na
b) Mg and K
c) Ti and Nb
d) Rb and Zr

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean