What is the Difference Between Beryllium and Lithium?

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Beryllium and lithium are both elements in the periodic table, but they have different properties due to their positions in the table and their atomic structures. Here are the key differences between beryllium and lithium:

  1. Appearance: Beryllium is a white-grey metal, while lithium is a silvery-grey metal.
  2. Type of Metal: Beryllium is a diamagnetic metal, meaning it does not react with magnetic fields, while lithium is a paramagnetic metal, which means it is weakly attracted to magnetic fields.
  3. Periodic Table Position: Both elements are in period 2 of the periodic table, but they belong to different groups. Beryllium is in group 2 (alkaline earth metals), while lithium is in group 1 (alkali metals).
  4. Conductivity: Beryllium is a better conductor of electricity than lithium due to its atomic structure and higher number of free electrons.
  5. Reactivity: Both elements exhibit reducing character, but lithium is the least reactive metal among the alkali metals.
  6. Melting and Boiling Points: Beryllium has higher melting and boiling points compared to lithium.
  7. Compound Formation: Beryllium forms covalent compounds, while lithium forms ionic compounds.
  8. Solubility: Lithium compounds are moderately soluble in water, while other alkali metals are highly soluble in water.
  9. Thermal Conductivity: Beryllium has a higher thermal conductivity than lithium, allowing it to transfer heat more effectively.

In summary, beryllium and lithium are both elements in period 2 of the periodic table, but they have different appearances, reactivities, melting and boiling points, compound formations, solubilities, and thermal conductivities due to their positions in the table and atomic structures.

Comparative Table: Beryllium vs Lithium

Here is a table comparing the differences between beryllium and lithium:

Property Beryllium Lithium
Color White-grey Silvery-grey
Atomic Number 4 3
Electron Configuration [He]2s^2 [He]2s^1
Electronegativity 2.55 0.98
Melting Point (°C) 1278 180
Boiling Point (°C) 2970 1342
Density (g/cm³) 1.85 0.534
Crystal Structure Hexagonal close-packed Body-centered cubic
Coordination Number 4 6
Reaction with Water Does not react with water even at high temperatures Reacts moderately with water
Compound Formation Forms covalent compounds Forms ionic compounds
Carbides Beryllium carbide is covalent in nature Other carbides are ionic

Beryllium and lithium are both s-block elements, but they have different properties due to their positions in the periodic table. Beryllium is an alkaline earth metal, while lithium is an alkali metal. They have some similarities, such as being partially soluble in water and having large atomic radii, but they also exhibit unique properties based on their respective group characteristics.