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Most elements are (blank). The (Blank) elements on the left side of the stairsteps line on the (blank) of elements are metals. Some physical properties of metals are (blank) "shininess", good conductors of (blank) and (blank), and can be hammered into (blank) sheets. Non-metals are found to the (blank) of the stair-step line on the Periodic table of elements. The characters of nonmetal are (blank) to those of metals. Nonmetal have a dull (blank) or (blank). Nonmetals also break easily and are not (blank) or (blank).Metalloids that are on (blank) sides of zig-zag line have both properties of metals and nonmetals. Metalloids can be or dull and can conduct heat and electricity (blank) well.

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.