The name of the scientist who organized the periodic table by atomic mass
Who is Mendeleev
100
The modern periodic table is organized by increasing _____
What is atomic number
100
Name a metalloid
What is Boron, silicon, arsenic, germanium, antimony, tellurium, astatine
100
The elements in the B-groups (3B, 4B, 5B, etc) are known as the ________
What is transition metals (transition elements)
100
What will the orbital and superscript always be at the end of the electron configuration for a noble gas?
What is p^6
200
Dobereiner organized elements into groups called ______
What is Triads
200
The reason why the length of the rows increase as you go down the periodic table
What is more orbitals, increasing number of energy levels, energy levels are larger
200
Name three properties of a metal
What is malleable, conductive, shiny, solids (except Hg), ductile
200
The elements in groups 1A, 2A, 3A-7A are known as the _____
What is representative elements
200
Which has a larger atomic radius, Na or its positive ion, Na+
What is Na
300
What did chemists use to sort elements into groups?
What is their properties
300
The name of the scientist who determined an atomic number for each element
What is Henry Moseley
300
In what state of matter are non-metals typically found in
What is gaseous
300
The atomic radius of fluorine will be ______ than the atomic radius of calcium
What is smaller
300
Which element will hold on to electrons more strongly, Nitrogen or Boron?
What is Nitrogen
400
Why didn't Mendeleev's periodic table work?
What is atomic mass can vary for atoms of an element because of isotopes
400
The name for the pattern that elements follow as you increase atomic number in the periodic table. The properties of elements change as you go across then this pattern repeats...
What is periodic law
400
Give the family name for the elements in groups 1A, 2A and 7A
What is Alkali Metals, Alkaline Earth Metals and Halogens
400
Electrons that are far away from the nucleus are not pulled inward because of their distance from the positive charge and because of the repulsion of other electrons. This is known as _____
What is shielding effect
400
Name the seven diatomic molecules
What is nitrogen, oxygen, fluorine, chlorine, bromine, iodine and hydrogen
500
How many elements had been identified by the year 1700?
What is 13
500
A pair of elements that showed Mendeleev's periodic table organization was incorrect.
What is potassium, cobalt, tellurium
500
Name a metal and a non-metal that is found in a liquid state at room temperature
What is Bromine and Mercury
500
Explain why the first ionization energy for Potassium is low and the second ionization energy is high
What is it is more difficult to pull off a second electron because potassium is very stable and has a full valence shell after one electron is removed.
500
The Mg (2+) and Na (+) ions each have the same number of electrons (10). Which ion will have the smaller atomic radius? EXPLAIN