Periodic Table Trends

This is our current Periodic Table of Elements

Metallic Properties

• Elements on the Periodic Table change from Metal, to Metalloid, to Non-metal as they go from left to right
• Elements become more metallic as the go from top to bottom

Metal

• A solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
• Found on the middle and left side of the Periodic Table

Metalloid

• Properties are intermediate between those of metals and solid non-metals
• Are electrical semiconductors

• Found in between metals and non-metals, separating the two like a staircase

Non-metal

• Does not have the properties of metallic elements, such as malleability
• Usually found in nature as gases or weak, brittle solids
• Found on the right side of the Periodic Table

Reactivity

• The ability of atoms of the element to donate, receive, or share electrons with the atoms of another elements
• From left to right, reactivity decreases
• From top to bottom, reactivity increases

Atomic Radius

• The size of the atom
• The distance from the atomic nucleus to the outermost electron orbital
• From left to right, atomic radius decreases
• From top to bottom, atomic radius increases

Density

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• How compact an atom is
• From top to bottom, density increases

Boiling/Melting Point

• The temperature at which an element boils or melts
• Elements at the centre of the periodic table have the highest boiling/melting point

Electronegativity

• The tendency of an atom to attract electrons in the formation of an ionic bond
• From left to right, electronegativity increases
• From top to bottom, electronegativity decreases

Ionization Energy

• The energy needed to remove electrons from the atom
• From left to right, ionization energy increases
• From top to bottom, ionization energy decreases

Ion Charge

• The charge (positive/negative) of an element
• Depends on their groups