Does the law of conservation of mass apply to physical changes? How could you test this for melting ice? For
the distillation of water

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

In saturated organic compounds, all the bonds between carbon atoms are called?

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery