Look at the simplified Periodic Table in the attachment. Each letter represents an element but the letter is not the real chemical symbol.
Use your knowledge to sort the letters to say whether they are metal
or non-metal elements.
W
Y
V
Z
x

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

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