Periodic Table Flashcards
What are periods?
Horizontal rows on the periodic table
What are groups?
Vertical columns on the periodic table
How is the periodic table arranged?
Arranged in periods by increasing atomic number
What is the number above an element on the periodic table?
Atomic number (Protons)
What is the number below an element on the periodic table?
Atomic weight (average mass of isotopes)
What are the elements commonly found as diatomic?
Hydrogen Nitrogen Fluorine Oxygen Iodine Chlorine Bromine
What does the molecular formula show?
Which atoms are present and how many
What does a structural formula show?
Which atoms are present
how many
And how they connect to each other
What does a perspective drawing show?
Which atoms are present
how many
how they connect to each other
And the shape
What does a ball and stick model show?
Which atoms are present how many how they connect to each other the shape And atom size
What does a space filling model show?
Which atoms are present how many how they connect to each other the shape atom size And shows overlap
What does a molecular formula show?
Shows how many atoms are in 1 molecule
Example: C8H10
Why at does empirical formula show?
Relative number in molecule (smallest whole number ratio)
Example: C4H5
How are ions formed?
Formed by adding and removing electrons
What are cations (+)
They become positively charged by losing 1 or more electrons
