Organization of the Periodic Table

For your chemistry unit assessment, you’ll need to memorize and sing this to the class.

Singalong time... “The Elements” http://www.youtube.com/watch?v=GFIvXVMbII0

Dmitri Mendeleev https://www.youtube.com/watch?v=0RRVV4Diomg 00:00-05:15

Dmitri Mendeleev Published the first periodic table in 1869.

Dmitri Mendeleev He recognized that some elements have similar chemical and physical properties. Fluorine and chlorine are both gases that burn your lungs. Silver and copper are both shiny metals that tarnish when exposed to air.

Periodic Table The periodic table contains information about the structures and characteristics of the elements.

Periodic Table Elements are arranged in the periodic table in order of their atomic number.

Periodic Table “Periodic” means regular, repeating pattern, and properties of elements repeat in each period (row).

Periodic Table

Periods A horizontal row of elements is called a period. The atomic numbers increase from left to right in a period.

Groups A vertical column of elements in the periodic table is called a group.

Groups Groups are numbered 1–18 across the top of the periodic table. Elements in the same group have similar properties (characteristics).

The Lanthanide and Actinide Series The two rows of elements at the bottom of the table are the Lanthanide Series and the Actinide Series (also called “rare earth metals”).

Metals Elements that are on the left and in the middle of the periodic table are metals.

Metals Metallic refers to the properties common to metals.

Metals Luster (shine) is one property of metals.

Metals Metals are also ductile and malleable. Malleable-able to be bent out of shape without breaking Ductile-able to be drawn out/formed into a wire

Metals Metals are good conductors. Conductivity is the ability of a material to transfer electricity or heat

Metals Most metals are solids at room temperature because of their high melting point (except Mercury-Hg)

Crash Course https://www.youtube.com/watch?v=0RRVV4Diomg 5:10-6:20

Nonmetals Elements on the right side of the periodic table are nonmetals.

Nonmetals Nonmetals have properties that are the opposite of metals.

Nonmetals Poor conductors of heat and electricity Brittle No luster.

Nonmetals Nonmetals make up most of the matter in living things

Nonmetals Most are gases at room temperature. iodine carbon bromine There are 5 which are solids: carbon (C), phosphorus (P), sulfur (S), selenium (Se) and iodine (I) and they are dull and brittle. Bromine (Br) is the only nonmetal that is liquid at room temperature. iodine carbon bromine

Nonmetals Group 17 elements are the halogens, which are the most reactive nonmetals, and most of them are dangerous to humans. F

Nonmetals Group 18 elements are the noble gases, which are extremely stable by themselves and occur in nature as single atoms, NOT compounds.

Metalloids 8-10 elements (depending who you ask!) are metalloids (also called semimetals)

Metalloids Metalloids have the properties of both metals and nonmetals. Conduct electricity, but not as well as metals, so they are called semiconductors.

Other Periodic Tables A variety of periodic tables are designed to provide the information needed by different groups of people.

Other Periodic Tables Other versions of the periodic table have been published over the years, but almost all scientists use Mendeleev’s version.

Crash Course https://www.youtube.com/watch?v=0RRVV4Diomg 06:20-End

If a substance transfers electricity easily, it is said to be ____. 7.1 Organization of the Periodic Table If a substance transfers electricity easily, it is said to be ____. A malleable B conductive C metalloid D ductile

The most reactive nonmetals are the ____ in Group 17. A noble gases B halogens C semimetals D Actinide series

Fluorine has properties most similar to ____. A oxygen B neon 7.1 Organization of the Periodic Table Fluorine has properties most similar to ____. A oxygen B neon C lithium D chlorine

Which is a property of metals? A poor conductors B brittle C low melting point D luster

Which of the following is a noble gas? A nitrogen B oxygen C argon D bromine

Elements in a period are arranged ____. A by increasing atomic number right to left B by increasing atomic number left to right C by increasing valence electrons right to left D by increasing electric charge right to left

Which element is a gas at room temperature? A neon B bromine C magnesium D uranium

Nonmetals are located where on the periodic table? A top B bottom C right side D left side