Periodic Table Flashcards
What is a Family?
Elements in columns with similar properties.
What is a Period?
Atomic number that increases horizontally from left to right.
What is a Group?
Same as Elements but listed from 1 to 8.
List ALL the Families…
Alkali Metals, Alkali Earth Metals, Transition Metals, Other Metals, Metalloids, Non-Metals, Halogens, and Noble Gases.
Characteristics of Metals…
Shiny, high density, solid and room temperature, ductile, malleable, high boiling-melting, 1-3 valence electrons.
Characteristics of non-metals…
low melting-boiling point, brittle, low density, poor conductors, tend to gain electrons in chemical reactions, non-ductile, non-malleable, commonly liquid or gas.
What is a Metalloid?
Elements that have properties between Metals and Non-metals.
Give three examples of Metalloids…
Boron, Silicon, Germanium.
Where do you find Metals in the Periodic Table?
Before Metalloids (left part of the Periodic Table).
Where do you find Non-metals in the Periodic Table? What Element is the exception?
After Metalloids (right part of the Periodic Table) & Hydrogen is the exception.
What do all Elements of a Group have in common?
Number of Valence Electrons.
What do all Elements in a Period have in common?
They have the same energy level.
What is the definition of an Element?
A substance made of one type of atom.
How many different elements are there? Are they all natural?
116 & no
What is a valence electron?
An electron in the higher energy level that can make new boundaries.
What are the characteristics of Lanthanides?
Reactive, burn easily in air, soft metals, pale colors, rare
What are the characteristics of Actinides?
radioactive, dense metals
