Organizing the Elements
Modern Periodic Table and Types of Elements
Representative Groups
200
True or False
Some elements, such as copper, tin, gold, and silver, have been known since antiquity.
True
200
The horizontal rows on a periodic table are called _____.
periods
200
The period in which an element resides indicates the ______ of that element.
valence shell
400
In the 1860s, the elements were organized into rows in order of increasing _____.
mass
400
The vertical columns on a periodic table are called ____.
groups
400
The valence shell is the _____.
outermost energy level
600
Considered to be the father of the periodic table.
Dmitri Mendeleev
600
Groups 1,2, and 13-18 are known as the ______.
representative elements
600
The group number indicates the number of _____ in the valence shell.
valence electrons
800
This scientist was actually the first to organize the elements into a table.
John Newlands
800
What are the three broad categories of elements on the periodic table?
Metals, Semimetals, and Nonmetals
800
How many valence electrons does element 6 (carbon,C) have?
four
1000
In 1913, this scientist reorganized the elements on the periodic table using a parameter that is still in use today rather than atomic mass.
Henry Moseley
1000
Name three properties of metals
good conductors, shiny, malleable, ductile
1000
Element 6 (oxygen, O) has it's valence electrons in what shell? Give a number.
2nd shell/energy level
1200
True or False
Mendeleev was able to predict the ____ of elements that had yet to be discovered.
properties
1200
Mostly mostly comprised of gases.
nonmetals
1200
Group 18 elements are called the ____.
nobel gases
1400
____ are pure substances that cannot be further divided into separate substances.
elements
1400
An element that is a dull in appearance, a poor conductor, and also brittle is likely a member of what broad category of elements?
nonmetals
1400
Group 17 elements are called the ____
halogens
1600
Elements on the modern periodic table are arranged in order of increasing ____.
atomic number/number of protons
1600
Elements that are generally shiny, brittle, and semiconductors are called _____.
semimetals/metalloids
1600
Magnesium belongs to what group?
alkaline earth metals
1800
A ___ is an arrangement of elements in columns, based on a set of properties that repeat from row to row.
periodic table
1800
Germanium (Ge) is a _____.
semimetal
1800
How many valence electrons do the alkali metals have?
one valence electron
2000
The periodic repetition of properties is called the _____.
periodic law
2000
Uranium is a _____.
metal
2000
All halogens have ____ valence electrons.
seven valence electrons
