What determines the chemical properties of an element? a. the number and arrangement of the electrons in an atom b. the number of neutrons and protons in an element c. the arrangement of all the neutrons, protons, and electrons d. the atomic mass of an atom

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]