This is a halogen and is found in group (15). It has (16) valence electrons. It has 17 electrons in a neutral atom. The element is (17), symbol (18). It has (19) photons and a mass number of 35. How many neutrons does it have? (20)

What are the three ways that an object can accelerate

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =