Table of Contents
Which is a Group 2 element?
The Group 2 alkaline earth metals include Beryllium, Magnesium, Calcium, Barium, Strontium and Radium and are soft, silver metals that are less metallic in character than the Group 1 Alkali Metals.
What are the chemical and physical properties of Group 2?
Physical and chemical behaviour
| beryllium | magnesium | |
|---|---|---|
| melting point (°C) | 1,287 | 650 |
| boiling point (°C) | 2,471 | 1,090 |
| density at 20 °C (grams per cubic centimetre) | 1.85 | 1.74 |
| oxidation number | 2 | 2 |
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 are Group 2 called alkaline earth?
Because the oxides and hydroxide formed by these metals are strongly alkaline in nature and these metal oxides are found in earth crust.
Which group 2 element is most reactive?
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. Because alkali metals are so reactive, they are found in nature only in combination with other elements.
Why are Group 2 elements called alkali metals?
Which statement best describes group 2 elements as they are considered in order?
Which statement best describes group 2 elements as they are considered in order from top to bottom of the Periodic Table? The number of principle energy levels increases, and the number of valence electrons remains the same.
Why is Group 2 reactive?
Alkaline Earth metals are very reactive because they readily give up their two valence electrons to achieve a full outer energy level, which is the most stable arrangement of electrons.
Can group 2 elements conduct electricity?
Alkali Earth Metals – Group 2 Elements Being a metal, they are obviously good conductors of heat and electricity. The general electronic configuration of Group 2 elements is ns2. Alkali earth metals have the capability to lose the two electrons in their outer shell.
What is the most reactive in group 2?
Hydrogen is a very reactive nonmetal. The alkali metals are the most reactive metals. Group 2 consists of the alkaline Earth metals. They are very reactive but less so than the alkali metals.
What is the reactivity of group 2 metals?
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. Beryllium has a strong resistant layer of oxide on its surface which lowers its reactivity at ordinary temperatures.
Why are Group 2 called alkaline earth metals?
Solution : Group 2 elements except beryllium are known as alkaline earth metals. These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in Earth. s crust.
What are the names of Group 2 elements?
Platinum group – Ru,Rh,Pd,Os,Ir,Pt.
What are Group 2 elements called?
The elements in group 2 are often called alkaline earth metals because they react with oxygen to form basic oxides. The group 2 elements have different uses related to their physical and chemical properties. Beryllium alloys and Magnesium alloys are strong and lightweight.
What are the uses of Group 2 elements?
– Be is used in the manufacture of alloys. Cu-Be alloys are used in the preparation of high strength springs. – Mg is used to prepare alloys with Al, Zn, Mn and Sn. Mg-Al alloys are used in construction of aircrafts. – Ca is used in the extraction of metals from their oxide. – Radium salt are used in radiotherapy.
What are the properties of Group 2 elements?
low density (mass over volume)