Reactivity. Reactivity of Group II elements increases down the group. This can be explained by the increase in ease at losing two outer electrons as we descend the group. The loss of electrons becomes easier due to the decreasing ionisation energy required.
Considering this, why does reactivity with water increase down Group 2?
You get less precipitate as you go down the Group because more of the hydroxide dissolves in the water. The Group 2 metals become more reactive towards water as you go down the Group. There is an additional reason for the lack of reactivity of beryllium compared with the rest of the Group.
One may also ask, what is the most reactive metal in Group 2? The alkali metals are the most reactive metals. Group 2 consists of the alkaline Earth metals.
In this regard, why is Group 2 less reactive?
The Group 2 elements tend to be less reactive than their Group 1 counterparts. The need to remove two electrons in order for the material to react means more energy is needed for electron removal.
Why does alkalinity increase down Group 2?
First ionisation energy decreases down the Group • Reactivity increases down the Group • Atomic radii increases down the Group • Alkalinity increases down the Group • Solubility increases down the Group • Ease of thermal decomposition decreases down the Group. Stability of the carbonate increases down the group.
17 Related Question Answers Found
Is Group 1 or Group 2 more reactive?
The outermost electrons of the alkaline earth metals (group 2) are more difficult to remove than the outer electron of the alkali metals, leading to the group 2 metals being less reactive than those in group 1. These elements easily form compounds in which the metals exhibit an oxidation state of 2+.
What happens to reactivity down Group 2?
Reactivity. Reactivity of Group II elements increases down the group. This can be explained by the increase in ease at losing two outer electrons as we descend the group. The loss of electrons becomes easier due to the decreasing ionisation energy required.
Is beryllium highly reactive?
Since beryllium is a highly reactive metal, reduction of its compounds requires the use of strong reducing metals.
What is the trend in Group 2?
Group 2 Elements are called Alkali Earth Metals. They are called s-block elements because their highest energy electrons appear in the s subshell. Progressing down group 2, the atomic radius increases due to the extra shell of electrons for each element. Going down the group, the first ionisation energy decreases.
Why does boiling point increase down Group 2?
The Incorrect Explanation Group 2 elements are held together by metallic bonds. The melting points decrease down the group because the metallic bonds are weaker for the larger elements. The atoms in a metal are held together by the attraction between the nuclei and the delocalized electrons.
Why does reactivity decrease down Group 7?
The reactivity of Group 7 elements decreases down the group. The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker. This weaker attraction in the larger atoms makes it harder to gain electron.
Why does reactivity increase down group1?
All group 1 metals have one electron in its outer shell. As we go down the group, the atom gets bigger. Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.
Why is Group 17 so reactive?
Like the alkali metals, the halogens are extremely reactive. They have seven valence electrons, meaning they require only one more electron for a noble configuration. This gives them very large electron affinities and extreme reactivity to form ions with a -1 charge.
Is SR more reactive than CA?
Why calcium is more reactive than strontium or barium? Strontium(Sr) and barium (Ba) both are group ii metal and lie below Calcium. As for metal we know that reactivity increases as we go down in the same group but calcium is placed higher in the reactivity series as in http://en.wikipedia.org/wiki/Reactivity_
What is the Group 2a element in period 2?
Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.
What are Group 2 elements called?
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Which alkali metal is most reactive?
Cesium
What are the two most reactive groups in the periodic table?
The two most reactive groups of elements are the alkali metals and the halogens, because of their valence electrons.
Why halogens are so reactive?
Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge. Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements.
What is the heaviest element in Group 2?
Radium (Ra) Radium is the heaviest and most radioactive of the alkaline earth metals and it reacts explosively with water.
Are halogens reactive?
The halogens include fluorine, chlorine, bromine, iodine, and astatine. All of these elements are considered to be reactive nonmetals. All members of the halogen family have seven valence electrons. Because these atoms are so close to having a full set of eight valence electrons, they’re very reactive.
What element is in Group 2 Period 4?
So technically no element is in Group 4 period 2. Zirconium, the second element in Group 4, is in period 5 not period 2; carbon, mentioned above, is now considered Group 14 instead of Group 4(A). Papers and texts published today have gone over to the newer nomenclature, but sometimes we are using older literature.