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Periodic Table History
Different Types of Elements
Periodic Trends
Metals, Metalloids, and Nonmetals
Random Things
100
Who invented the modern periodic table?
Henry Moseley
100
Which group are the halogens in?
Group 17
100
What are the four periodic trends?
Ionization energy, Atomic Radius, Electron Affinity, Electronegativity
100
Which of the three is the best conductor of heat and electricity?
Metals
100
What is the difference between groups and periods?
Groups are verticals and periods are horizontal.
200
When was the modern periodic table invented?
1913
200
What are the 5 most important types of elements?
Alkali metals, Alkali earth metals, Transition elements, Halogens, Noble Gases
200
What is ionization energy?
The amount of energy needed to remove the outermost electron.
200
Are nonmetals ductile?
No
200
How many periods are on the periodic table?
7
300
Who invented the first periodic table?
Who is Dmitri Mendeleev?
300
What are two characteristics of Noble Gases?
1. They have a full octet. 2. The do not react with other elements.
300
When going down the periodic table does ionization energy increase or decrease?
Decreases
300
What type of bonds do metalloids form?
Ionic
300
What is the most electronegative and reactive of all elements?
Flourine
400
What is the modern periodic table law?
Properties of the elements are the periodic functions of their atomic number.
400
Which groups contain transition elements?
Groups 3 - 12
400
What is electron affinity measured in?
kJ/mol
400
What is hydrogen classified as?
Nonmetal
400
What is the atomic number of the element that is the last to occur naturally?
92
500
How did Mendeleev arrange his periodic table?
By mass as well as by similar characteristics.
500
What kind of compounds do transition metals form?
Brightly colored compounds
500
What is the atomic radius measured in?
Picometers (pm)
500
What elements are the metalloids?
B, Si, Ge, As, Sb, Te
500
What is metallic character?
How easily an element loses an electron.