Category 1
What are the vertical columns in the periodic table known as?
groups or families
What are the horizontal rows in the periodic table called?
periods
What does the "stair step" border separate in the periodic table?
metals and non metals
Who was the first person to begin categorize the elements?
Antoine Laviosier
When scientists agreed on how to determine atomic mass, then they could begin to better categorize the elements. true or false?
true
Orbital energy levels for each element can be found by looking at...
period number
Is the difference between 1st, 2nd, 3rd ionization energy the same?
no
What did Henry Moseley do?
Improved Mendeleev's periodic table by organizing the elements based on atomic number rather than atomic mass
A good conductor of heat and electricity, shiny, smooth, malleable
metal
A good insulator, poor conductor, typically a gas or dull solid
non metal
Which elements make up the "stair step" border in the periodic table?
B, Si, Ge, As, Sb, Te, Po, At
What is the amount of energy required to remove an electron?
Ionization Energy
What affects the elements ability to form bonds?
Electronegativity
Where would the elements with the highest electronegativity be?
the top right
What can be said about the ionization energy of the elements in the top right corner of the periodic table?
generally very high
When does atomic number and atomic mass increase?
As you move to the right and down on the periodic table
Why was Mendeleev's periodic table so widely accepted?
It predicted the existence of unknown elements at the time
What elements make up groups 3-12?
transition metals
What elements make up group 2?
The Alkaline Earth Metals
What elements make up group 17?
Halogens
Which category of elements will have their valence electrons in the d orbital?
transition metals
Provide an example of an element that is a nonmetal
Provide an example of an elements that is a metal
answers will vary
What happens to atomic radii as you go to the left in the periodic table? up?
It decreases for both
When does ionic radii increase?
as you go down the periodic table and as you go to the left on the periodic table.