History
What was the name of the Russian scientist who organized the elements into a useful chart very much like the chart we use today?
Dmitri Mendeleev
Each ring or layer around the nucleus where electrons can be found are called?
Energy levels
What do all the elements in a vertical column of the periodic table have in common?
Valence Electrons
The only metal that is liquid at room temperature
Mercury
The quality of reflecting light from its surface
Luster
The English chemist, John Newlands organized the elements into groups of eight called?
octaves
The closer the electron is to the nucleus the ____ energy it has.
Less
The horizontal rows of the periodic table are called?
Periods
Silicon is a major component of computer microchips because it is a ...
Semiconductor
Means can be rolled or hammered into a shape
Malleable
Arranging the elements according to their ________ corrected all the issues of having elements out of order or in the wrong column.
Atomic Numbers
The electrons in the outermost energy level are called?
Valence Electrons
The alkali metals in Group 1 are all very chemically...
Reactive
Flourine
Means can be drawn into wires
Ductile
What English physicist arranged the elements according to their atomic number and created the periodic table that we use today?
Henry Moseley
You can easily determine the total number of energy levels that are occupied by electrons for a given element by noting the row or period that the element is in. Silver is in period 5 and group IB in what energy level are the valence electrons of silver?
5th energy level
The strong metals in the middle of the periodic table are called the ....
Transition Elements
What noble gas is commonly used in glowing advertising signs?
Neon
Means being very good at transferring heat or electricity
What states that the chemical properties of the elements are periodic functions of their atomic numbers?
Periodic Law
In what energy level are the valence electrons of Carbon?
2nd energy level
What is the nickname for the gases on the far right because they do not combine (react) easily with other elements?
Noble Gases
What halogen is used to kill microscopic organisms in water?
Chlorine
Elements that have both metallic and nonmetallic properties
Metalloids