The earth's atmosphere is composed of 78% nitrogen, 21% oxygen, 0.9% argon, and 0.1% traces of other gases. If the total pressure right now is 101.3 kPa, what is the partial pressure of argon?

What effect does nuclear radiation have on atoms?

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?

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass