Periodic Trends Flashcards
A verticle collumn on the periodic table is called a
Group
Who first arranged the periodic table
Mendelev
The elements in the periodic table are arranged in order of increasing
Atomic number
Periodic Law
Elements are arranged by their attomic numbers
Alkali Metals
Group 1
Halogens
Group 17 elements (non metal)
Noble Gasses
Group 18
Transition metals
Groups 3-12
Hydrogen
On its own
Alkaline Earth metals
Group 2
2 bottom rows
F Block
Ion
Atom with positive charge
How does an atom become charged
When it gains or looses electrons
As you move left to right, the size of an atom
Decrease
Why do the sizes get smaller from left to right
Increase amount of Protons
As you move down a group, the size of the atoms will
Increase
Why do the atoms get bigger as you move down a group
Greater energy levels
Ionization Energy
Amount of force needed to remove electron
Ionization energy increases as you move
Across
Ionization energy decreases as you move
Up
What is the highest electronegativity
4.0
What is electronegativity
The ability of an atom to attract electrons to itself when the atom is in a chemical bond
Electronegativity will ____ as you move down a group
Decrease
Electronegativity will ____ as you move across a period
Increase
