What does highly reactive mean?

Answer 1

It means metals that are highly reactive. It's one of the most self-evident pieces of terminology in all of chemistry.

Perhaps you were trying to ask which metals are considered "highly reactive", which is a separate question, and one that to some extent depends on your definitions, but would certainly at minimum include all the alkali metals, maybe the alkaline earth metals, and possibly a few selected others (aluminium, for example... we don't usually think of aluminium as "highly reactive" because it immediately forms a thin transparent protective layer of aluminium oxide when exposed to air, but without that layer, it is indeed pretty reactive).

Answer 2

It means-

1. Tending to be responsive or to react to a stimulus.

2. Characterized by reaction.

3. Chemistry & Physics Tending to participate readily in reactions.

re·active·ly adv.

re·active·ness, reac·tivi·ty n.

Answer 3

*Reactivity* is a somewhat vague concept used in chemistry which appears to embody both thermodynamic factors and kinetic factors i.e. 'whether or not a substance reacts and how fast it reacts'

Answer 4

is the ability of two or more substances to combine and form one or more new substances

Answer 5

Reactivity means ready susceptibility to chemical change.

Answer 6

Reactivity is the ability of a substance to react with another substance.