The most significant attempts to organize the elements did not occur until after this scientist presented a method for determining the atomic mass of an element that became accepted as the standard method
Who is Cannizzaro
100
This block of the periodic table contains metals with similar reactivity to the alkaline earth metals and radioactive metals
What is the f-block
100
Mendeleev first grouped elements together because they have these
What are similar properties
100
Which atom is largest? Al, Si, or Ar
What is Al
100
Moseley worked in the lab of this scientist, who discovered the nucleus
Who is Rutherford
200
Unlike Bohr who based his model of the atom on visible light spectra, Moseley's work used emission spectra of this form of electromagnetic radiation
What is x-ray
200
The majority of elements are this, giving them the ability to conduct heat and electricity
What are metals
200
The number of these are the reason elements in the same family have similar reactivity and other characterists
What is valence electrons
200
Which is the least electronegative? Fe As S
What is Fe
200
According to the uncertainty principle, this value cannot be known with certainty if we have some idea of the velocity of an electron
What is position
300
Periodic law states that the physical and chemical properties are periodic functions of this value.
What is atomic number
300
The most reactive metals are located in this block of the periodic table
What is the s-block
300
The most reactive non-metals, this family of element contains the most electronegative element.
What are the halogens
300
This increases when electrons occupy a higher energy level and there are more inner shell electrons to come between the nucleus and valence electrons
What is shielding
300
The tyndall effect can be used to distinguish between the types of mixtures. Light will scatter if shown through this type of mixture which is composed of one substance visibly dispersed throughout another substance
What is a colloid
400
Although he is credited with the discovery of periodic law, Mendeleev arranged his periodic table based on this quantity.
What is increasing atomic mass
400
One way to distinguish between metals and nonmetals is by testing this property in which a metal will be able to bend or be shaped into a sheet whereas the nonmetals will break
What is malleability
400
Although both groups of the s-block are highly reactive, this family of elements has an explosive reaction with water due to the production of the flammable gas, hydrogen
What are the alkali metals
400
This is the reason why there is a jump in ionization energy when a noble-gas configuration is achieved
What is the atom has an octet or filled s and p sublevels in the highest occupied energy level and doesn't want to lose an electron
400
This quantum number determines the number of orbitals in a given sublevel.
What is the magnetic quantum number (ml)
500
Mendeleev predicted the properties of undiscovered elements based on these two facts
What is his grouping of the elements by family and the elements location on the periodic table
500
These six elements are sometimes referred to semiconductors because they conduct heat and electricity to a lesser degree than metals, but to a greater degree than nonmetals.
What are boron, silicon, antimony, tellerium, arsenic, and germanium
500
This family of elements provides insight into stable electron configuration based on their behavior compared to the other elements.
What are the noble gases
500
The decrease of atomic radius and increase in ionization energy across a period can be attributed to an increase in this quantity as a result of atomic number going up
What is effective nuclear charge
500
When adding and subtracting measurements, uncertainty is taken into account (answer has the correct number of significant figures) by rounding the answer according to this