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Alkaline earth elements
- Group 2 elements are a set of chemical elements that belong to the second column of the periodic table. They are also known as alkaline earth elements.
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Oct 21, 2024 · The group 2 elements react with oxygen, water and dilute acids. Group 2 Reactions - Observations. Reactions with water and oxygen. The reaction of group 2 metals with oxygen follows the following general equation: 2M (s) + O2 (g) → 2MO (s) Where M is any metal in group 2. Remember than Sr and Ba also form a peroxide, MO 2.
- Explaining Group 2 Trends
All elements in Group 2 (also called alkali earth metals)...
- Explaining Group 2 Trends
- Beryllium (Be) Atomic Number = 4 Mass = 9.012 g mol Electron Configuration =1s22s2Density = 1.85 g cm-3. Beryllium was first identified in 1798 by Louis-Nicolas Vauquelin, while performing a chemical analysis on aluminum silicates.
- Magnesium (Mg) Atomic Number = 12 Mass = 24.31 g mol Electrion Configuration = [Ne]3s2 Density = 1.738 g cm-3. Magnesium was first discovered in 1808 by Sir Humphry Davy in England by the electrolysis of magnesia and mercury oxide.
- Calcium (Ca) Atomic Number = 20 Mass = 40.08 g mol Electron Configuration = [Ar]4s2 Density = 1.55 g cm-3. Calcium was isolated in 1808 by Sir Humphry Davy by the electrolysis of lime and mercuric oxide.
- Strontium (Sr) Atomic Number = 38 Mass = 87.62 g mol Electron Configuration = [Kr]5s2Density = 2.64 g cm-3. Strontium was first discovered in 1790 by Adair Crawford in Scotland and is named after the village it was discovered in, Strontian.
the vertical columns are called groups. elements in the same group are similar to each other. the metals are on the left and the non-metals are on the right. the main groups are numbered from 1...
Nov 28, 2022 · All elements in Group 2 (also called alkali earth metals) have two electrons in their outermost principal quantum shell. All Group 2 metals can form ionic compounds in which they donate these two outermost electrons (so they act as reducing agents) to become an ion with +2 charge (so they themselves become oxidised) Going down the group, the ...
Understanding Chemistry . PERIODIC TABLE GROUP 2 MENU . Atomic and physical properties . . . Discusses trends in atomic radius, ionisation energy, electronegativity and melting point of the Group 2 elements. Reactions with water . . . Looks at the trends in the reactions between the Group 2 elements and water. Reactions with oxygen . . .
Aug 2, 2016 · Using Magnesium to Extract titanium. Titanium is a very useful metal because it is abundant, has a low density and is corrosion resistant – it is used for making strong, light alloys for use in aircraft for example. Titanium is extracted by reaction with a more reactive metal (e.g. Mg, Na).
Group 2 metals react with water to form metal hydroxides. For example: Mg + 2H 2 O → Mg (OH) 2 + H 2. Reactivity increases as you go down Group 2. This is because the lower elements have lower ionisation energies. Beryllium is an exception. If beryllium were to lose two electrons it would be tiny and have a very high charge density.
