Development
What trends do you see in the periodic table?
electronegativity, ionization, electron affinity, atomic radius melting point, and metallic character trends.
What does Group 1 consist of?
Alkali Metals
What are the physical properties of group 1?
they are silver-gray solids that are soft enough to cut with a knife.
How many valence electrons are in group 1?
1
What is the definition of Ions?
a group of atoms that has a positive or negative charge.
Who helped develop the periodic table?
Dimitri Mendeleev
What does Group 2 consist of?
Alkaline Earth Metals
What are the physical properties of group 4?
Elements are all solids at room temperature
How many valence electrons are in group 3?
3
What is the definition of Atomic radii
One half the distance between the nuclei of two atoms of the same element when the atoms are joined.
How was the periodic table arranged?
the modern periodic table was arranged by the order of atomic number in periods and groups
What does Group 3 consist of?
The Boron Family
What are the physical properties of group 5?
Except for nitrogen gas group 5 elements are solid at room temperature
How many valence electrons are in group 5?
5
What is the definition of Ionic radii
The ionic radius is the distance between the nucleus and the electron in the outermost shell of an ion.
Why was the periodic table arranged this way?
The elements are arranged from left to right and top to bottom in order of increasing atomic number
What does Group 8 consist of?
The Noble Gases
What are the physical properties of group 7?
Halogns are nonmetals. At room temperature, fluorine and chlorine are gases and bromine is a liquid. Iodine and astatine are solids
How many valence electrons are in group 7?
7
What is the definition of Ionization energies
Ionization energy is the quantity of energy that an isolated, gaseous atom in the ground electronic state must absorb to discharge an electron, resulting in a cation.
Why were their holes in his PT?
There were holes in his periodic tabe because sometimes the next heaviest element didnt fit with the properties beside it. He would skip places to be able to put the element in a similar group with similar properties.
What does Group 5 consist of?
The Nitrogen Family
What are the physical properties of group 6?
Except for oxygen gas, O2, group 6 elements are solid at room temperature
How many valence electrons are in group 8?
What is the definition of Electronegativities
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.