Periodic Table
What is NONMETALS
An alkali metal in the 3rd energy level.
What is sodium?
This element has the following electron configuration:
1s22s22p63s1
What is Sodium?
This is the distance from the nucleus to the edge of an atom.
What is atomic radius?
Who is known as the father of the periodic table?
What is Mendeleev?
Elements located on the "stairstep"
What is METALLOIDS?
This group has 5 electrons in the p block.
What is Halogens?
This element has the following electron configuration:
1s22s22p63s23p4
What is Sulfur?
What happens to the atomic radius as you go across a period and why?
The radius decreases because there are more charges in the nucleus to attract electrons.
This classifies a group as one of the eight representative groups.
What is number of valence electrons?
The transition metals are located here.
What is Groups 3-12?
Ar is found in this group.
What is Noble Gases?
This element has the following electron configuration:
1s22s22p63s23p64s23d104p65s24d105p3
What is Antimony?
What happens to the ionization energy as you go down a group?
It decreases because because the atom gets bigger as you go down a group, so the attraction between the nucleus and electron is not as strong.
This person organized elements into Triads.
What is Dobereiner?
The inner transition metals make up this block.
What is the F-block?
The following is a characteristic of Alkali metals.
What is very reactive?
What is 1 valence electron?
What is soft or shiny?
The following element has an electron configuration of:
[Xe] 6s24f145d7
What is Iridium?
This happens to the electronegativity as you go across a period?
What is electronegativity increases?
What is increasing atomic number?
Elements 58-71 are known as this term.
What is Lanthanides?
What where the noble gases previously called and why?
The INERT GASES because they do not react.
[Rn] 7s2
What is Radium?
Describe the difference between electron affinity and ionization energy.
Ionization energy is the amount of energy it takes to lose an electron while electron affinity is the energy it takes to add an electron to an atom.
Every element in a period has this in common.
What is principle energy level?