A substance combines with oxygen and releases energy in the form of heat and light. Which of the following best describes this type of chemical reaction?

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?

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom