Answer:
KE = 1/2 mv^2=0.5x 10 X 20^2= 800
Explanation
81. There is 1 carbon, 2 chlorine and fluorine atoms in Freon 12. To draw them it forms a cross with C in the middle and Cl and F both on the opposite side.
They were natural philosophers that used experimentation to establish the cause effect relations and explanations, in an epoque when many "theories' were not supported by experiments but by some authority (antique philosophers like Aristoteles or the Catholic Church).
Do elements in a group on the periodic table have similar chemical properties because their atoms have the same number of electrons
A. same number of outermost electrons
