This Russian scientist is one of the chemists credited with publishing the first periodic table.
Who is Mendeleev.
100
Effective nuclear charge (Zeff) ___ going from left to right across the periodic table.
What is increases?
100
This category of elements can form cations and have luster.
What are metals?
100
This is the name of the group 1A metals.
What are the Alkali metals?
100
This is the phase of hydrogen in its elemental form.
What is the gas phase?
200
This German scientist is the other chemist credited with publishing the first periodic table.
Who is Meyer?
200
Atomic radius ___ going left to right across a period and ___ going down a column.
What is decreases and increases?
200
This category of elements are considered dull and brittle.
What are nonmetals?
200
This group of metals have an outer electron configuration of ns^2.
What are the group 2A metals.
200
The ionization energy of hydrogen is ___ compared to group 1A elements.
What is high?
300
This chemist developed the idea of atomic numbers in 1913.
Who is Moseley?
300
Cations are ___ than there parent atom.
What is smaller?
300
This category of elements are good insulators and form acidic oxides in water.
What are nonmetals?
300
This is the name of the group 2A metals.
What are the Alkaline Earth metals.
300
Nuclear reactions in the sun involving hydrogen are what produce its heat and light (i.e. energy). This allows us to conclude that hydrogen would be a good ___.
What is fuel?
400
This chemist proposed that the periodic table was organized according to electron configuration rather than atomic number.
Who is G.N. Lewis?
400
Ionization energy ___ going down a column and ___ going across a period.
What is decreases and increases?
400
This category of elements conduct heat and electricity well.
What are metals?
400
This is the charge found on all Group 2A ions.
What is +2?
400
When hydrogen loses an electron, it becomes the ___ ion.
What is hydrogen?
500
This scientist proposed the nuclear model of the atom.
Who is Rutherford?
500
Electron affinity ___ going across the periodic table.
What is increases?
500
This category of elements are semiconductors.
What are metalloids?
500
This group of metals appear as soft metallic solids.
What are the Alkali metals?
500
When hydrogen gains an electron, it becomes the ___ ion.