E 12. A physical property that incr
the periodic table is
A. atomic radius B. metallicity
C. ionic radius
D. electron affinity
13. a Arg) + bB () - 4 Go + y Hg)
The equilibrium constant of the above reaction at
constant temperature is
[G][H]
[G]* H)
A.
B
(A]B]
[A] [B]
[HI
[G]
C.
D
[A] [B]
[A1" B
ed by
8 when
14. The average kinetic energy of the molecules of a gas
A decreases with a decrease in pressure​

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.