Please answer asap will give you 30 pts On p 5, Radon gas and its relation to granite like used in kitchen counters is discussed. What advice should one use when hearing about granite or other substances like it? (see last paragraph)

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reactants. consider 1 mole of tritium plus 1 mole of deuterium to be a mole of “reactions” (total molar mass = 5 grams).

Which substances have the lowest melting points: ionic covalent, or metallic