The reactivity of alkali metals increases from the top to the bottom of the group, so
lithium (Li)
is the least reactive alkali metal and francium
What is the reactivity of group 1?
The reactivity of Group 1 elements
increases as you go down the group
because: … the outer electron gets further from the nucleus as you go down the group. the attraction between the nucleus and outer electron gets weaker as you go down the group – so the electron is more easily lost.
Which element of group 1 is most reactive and why?
So,
Cesium
is the most reactive element in group IA. Note: All the alkali metals react vigorously with halogens to produce salts, as the halogens needs one electron to complete its octet and alkali metals can readily lose electrons to have an oxidation state of +1.
Why Is Lithium the least reactive in group 1?
Lithium is the least reactive
because it is the one with the least electrons
. That means the electrons are closer to the nucleus and therefore more attracted to it.
What are the least reactive groups?
Group 18: Noble Gases
Group 18 elements are nonmetals called noble gases (see Figure below). They are all colorless, odorless gases. Their outer energy level is also full, so they are the least reactive elements.
Why is group 1 most reactive?
Elements in the same group of the periodic table have the same number of valence electrons. These are the electrons in their outer energy level that can be involved in chemical reactions. …
All the elements in group 1 have just one valence electron
. This makes them very reactive.
What are the two most reactive elements in group 1?
Reactivity of Group 1 Elements
The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and
francium (Fr)
is the most reactive.
Which element in group 1 is the most reactive in water?
The alkali metals (
Li, Na, K, Rb, Cs, and Fr
) are the most reactive metals in the periodic table – they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen.
Which element in Group 7 is the most reactive?
Fluorine
is the most reactive element of all in Group 7. You can see the trend in reactivity if you react the halogens with iron wool.
Which one is a reactive element?
The halogens, alkali metals, and alkaline earth metals are highly reactive. The most reactive element is
fluorine
, the first element in the halogen group. The most reactive metal is francium, the last alkali metal (and most expensive element).
Why is lithium most reactive?
Reactivity. Lithium is part of the Group 1 Alkali Metals, which are highly reactive and are never found in their pure form in nature. This is
due to their electron configuration
, in that they have a single valence electron (Figure 1) which is very easily given up in order to create bonds and form compounds.
Why is lithium least reactive towards water?
All the alkali metals readily react with water to form hydroxides with the release of the hydrogen gas but lithium reacts slowly with water because it
has higher activation energy and slower rate of reaction
and forms colorless solution of lithium hydroxide along with the release of hydrogen gas.
Are Group 1 metals reactive?
Alkali metals are
among the most reactive metals
. This is due in part to their larger atomic radii and low ionization energies. They tend to donate their electrons in reactions and have an oxidation state of +1.
Which is more reactive N or NE?
Which is more reactive N or NE? … As we can see from the electronic configurations,
neon
has a fully filled outer shell and hence is non-reactive. Hence, it is much easier for oxygen to complete its octet, as compared to nitrogen and that is why, oxygen is more reactive than nitrogen.
What is the least reactive element in Group 7?
This is because group 7 elements react by gaining an electron. As you move down the group, the amount of electron shielding increases, meaning that the electron is less attracted to the nucleus. For this reason, fluorine is the most reactive halogen and
astatine
is the least reactive of the halogens.
What is the least reactive element in Group 2?
The least reactive element in group 2 is
beryllium
. Even at red heat beryllium will not react with water and it does not react with dinitrogen (N
2
).
