The electrons determine the reactivity. How many valence electrons there are. It is easier to lose one electron rather than three, so an element with one valence electron will be more reactive than one with three.
An element's reactivity depends upon its ability to loose electrons which in turn depends upon its ionisation enthalpy.While moving down the group in a Periodic Table reactivity increases while it decreases when one moves from left to right due to this factor.
The number of electrons are in the valence shell apex:P
Functional Group
The density and specific gravity of a mineral is caused by the arrangement of atoms in the crystalline structure and the elements of which the mineral is composed.
its Atomic Mass.
An organism's genotype determines its phenotype.
DNA determines a specific trait.
Roughly, first ionization potential and electron affinity.
The number of loosely held electrons determines the reactivity of an element. Other elements attract electrons and will react also.
By using the activity series (sometimes called reactivity series) which orders metals by their reactivity with other metals, one can determine the reactivity of a metal
we cant say the reactivity of H but reactivity of H can be ordered or compared with other elements. see the reactivity series
total number of electrons
not reactive
From the elements given, argon shows the least reactivity.
Electronegativity is a measure of the reactivity; see the link below.
inertness, non-reactivity
Depends on the elements with which they are reacting with.
Elements in the same column on the periodic table have similar chemical reactivity because they have the same outer electron configuration and it is the electron structure that determines an elements properties.
It is one of the least reactive elements.