Compare Elements

Compare two chemical elements side by side across 19 atomic and physical properties.

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Element comparison
Property Li Lithium Ne Neon
Atomic Number 3 lower 10 lower
Symbol Li different Ne different
Name Lithium different Neon different
Atomic Mass 7 lower 20.18 lower
Category Alkali Metals different Noble Gases different
Period 2 same value 2 same value
Group 1 lower 18 lower
Block s-Block different p-Block different
Standard State Solid different Gas different
Electronegativity 0.98 no data — no data
Atomic Radius 182 higher 154 higher
Ionization Energy 5.392 lower 21.565 lower
Electron Affinity 0.618 no data — no data
Oxidation States +1 different 0 different
Melting Point 453.65 K (180.5 °C) higher 24.56 K (-248.59 °C) higher
Boiling Point 1615 K (1341.85 °C) higher 27.07 K (-246.08 °C) higher
Density 0.534 higher 0.0009 higher
Electron Configuration [He]2s1 different [He]2s2 2p6 different
Year Discovered 1817 different 1898 different

higher lower