Li, or lithium, is the element most likely to lose electrons in a chemical bond. Lithium has 1 valence electron.
If you mean two different elements, no. That would defeath the purpose of having chemical symbols.
boron
I want to say that the answer is that the concept is called chemical reactivity, but that would be referring to their chemical properties as well..
No, Hurricane usually do not stray far from the tropics.
An element can be described by observing its physical and chemical properties.
Each chemical element has specific chemical and physical properties.
This would be called an element, or a mono-atomic compound.
Elements
Iodine
Yes, that would be a decomposition reaction.
Elements in a same group have same number of valence electrons and hence similar physical and chemical properties.
I would expect all elements in group 1 to have similar chemical behavior to that of sodium, except for hydrogen. Hydrogen is not a metal, but has only 1 valence electron like the other elements in group 1.