Answer:
Some of the Alpha particles shot at the gold foil bounced back.
Explanation:
simple molecules contain two atom bonded together
The alkali earth metals have two valence electrons.
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Answer:
The valence shell of noble gases has all 8 valence electrons which means it is full.
Explanation:
Answer: at relatively low temperatures.
Explanation:
According to Gibbs equation;

= Gibb's free energy change
= enthalpy change
T = temperature
= entropy change
A reaction is spontaneous when
= Gibb's free energy change is negative.
Thus 

Thus the reaction is spontaneous or
is negative only when 
Thus the reaction is spontaneous at relatively low temperatures