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Calvert - Ch 5

Periodic Table and Trends

Who presented a convincing method for accurately measuring the relative masses of atoms. Stanislao Cannizzaro
Who arranged the elements according to their properties along with the atomic mass of the element. Dmitri Mendeleev
Who arranged the periodic table according to the atomic number. Henry Moseley
The physical and chemical properties of the elements are periodic functions of their atomic numbers is what law? Periodic law
An arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group is the? Periodic table
The name of Group 18 Noble gases
The 14 elements with atomic numbers from 58 (Ce) to 71 (Lu) Lanthanides
The 14 elements with atomic numbers from 90 (Th) to 103 (Lr) Actinides
The name of Group 1? Alkali Metals
The name of Group 2? Alkaline-Earth Metals
What are the main-group elements? The s-block and p-block elements
The name of groups 3 - 12? Transition metals
The name of Group 13? Boron Group
The name of Group 14? Carbon Group
The name of Group 15? Nitrogen Group
The name of Group 16? Chalcogens
The name of Group 17? Halogens
1/2 the distance between the nuclei of identical atoms bonded together. Tells you the volume of the atom. Atomic Radii
What happens to the radii as you go from left to right across the periodic table? Decreases
What happens to the radii as you go down the periodic table? Increases
Why does the atomic radii decrease as you go across the periodic table? The added electrons in the same energy level are gradually pulled closer to the more positively charged nucleus.
Why does the atomic radii increase as you go down a group? Energy levels are added
what is the energy required to REMOVE one electron from a neutral atom of an element? Ionization energy
What happens to the ionization energy as you go from left to right across the periodic table? Increases
What happens to the ionization energy as you go down a group on the periodic table? Decreases
A positive ion Cation
A negative ion Anion
The electrons available to be gained, lost or shared when forming a chemical compound. Valence electrons
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing? atomic mass
The discovery of the noble gases changed Mendeleev's periodic table by adding a new? Group
To which group do lithium and potassium belong? Alkali metals
Elements in a group or column in the periodic table can be expected to have similar? properties
Mendeleev predicted that the spaces in his periodic table represented? undiscovered elements
Mendeleev attempted to organize the chemical elements based on their? properties
In the modern periodic table, elements are ordered according to? increasing atomic number
The most useful source of general information about the elements for anyone associated with chemistry is a? periodic table
Argon, krypton and xenon belong to what family? noble gases
The most characteristic property of the noble gases is that they are? largely unreactive
Because the first energy level contains only the 1s sublevel, the number of elements in this period is? two
The elements that border the zigzag line in the periodic table are the? metalloids
The most reactive group of the nonmetals are the? Halogens
How many valence electrons in Group 17? seven
Created by: bcalvert