REACTIVITY OF METALS

• Metal Reactivity: Reactivity is the tendency of a metal to undergo chemical reactions, often releasing energy. Metals can react with oxygen, water, acids, and other elements.

  Periodic Trends: As you move across a period and down a group on the periodic table, the reactivity of metals changes predictably.

  Atomic Structure and Reactivity: The structure of atoms (number of valence electrons and atomic radius) affects their reactivity.
• What is the atomic number of Hydrogen?

  1
• What is the atomic mass of Lithium?

  1. 941
• What is the atomic number of Beryllium?

  4
• What is the atomic mass of Sodium?

  22.990
• What is the atomic number of Magnesium?

  12
• What is the atomic mass of Potassium?

  39.098
• What is the atomic number of Calcium?

  20
• What is the atomic mass of Scandium?

  44.956
• What is the atomic number of Titanium?

  22
• What is the atomic mass of Vanadium?

  50.942
• What is the atomic number of Chromium?

  24
• What is the atomic mass of Manganese?

  54.938
• What is the atomic number of Iron?

  26
• What is the atomic mass of Cobalt?

  58.933
• Reactivity Trend by Group: Let’s discuss how metal reactivity changes down a group:

  • For example, in Group 1 (Alkali Metals), reactivity increases as you go down the group (from lithium to cesium).

  Reactivity Trend by Period: Let’s discuss how metal reactivity generally decreases as you move from left to right across a period.

  • Metals on the left (like alkali and alkaline earth metals) are more reactive than transition metals found in the center of the periodic table.

  Key Question: Why do these trends exist?
• What is the atomic number of Nickel?

  28
• What is the atomic mass of Copper?

  63.546
• What is the atomic number of Zinc?

  30
• What is the atomic mass of Gallium?

  69.732
• What is the atomic number of Aluminum?

  13
• What is the atomic mass of Boron?

  10.811
• What is the atomic number of Germanium?

  32
• What is the atomic mass of Silicon?

  28.086
• What is the atomic number of Carbon?

  6
• What is the atomic mass of Arsenic?

  74.922
• What is the atomic number of Phosphorus?

  15
• What is the atomic mass of Nitrogen?

  14.007
• What is the atomic number of Sulfur?

  16
• What is the atomic mass of Oxygen?

  15.999
• What is the atomic number of Bromine?

  35
• What is the atomic mass of Chlorine?

  35.453
• What is the atomic number of Fluorine?

  9
• What is the atomic mass of Krypton?

  84.80
• What is the atomic number of Argon?

  18
• What is the atomic mass of Neon?

  20.180
• What is the atomic number of Helium?

  2
• What is the atomic mass of Rubidium?

  84.468
• What is the relationship between valence electrons and reactivity in metals?

  Fewer valence electrons increase reactivity
• What is the atomic number of Strontium?

  38