2. Atoms & Elements

Periodic Table: Representative Elements & Transition Metals

How to identify METALS  NONMETALS and METALLOIDS on the PERIODIC TABLE

Determine whether or not each element is a main-group
element.
d. manganese

Which of the following is a representative element, found in the 3rd Period, that is also a pnictogen.

Periodic Table: The Transition Metals

Transition metals and their properties | Matter | Chemistry | FuseSchool

What are the representative elements of the periodic table?

Periodic Table: Representative Elements & Transition Metals Example 1

Where in the periodic table are the main-group elements found? Where are the transition metal groups found?

The Transition Metals can be found in Groups 3 to 12 with the remaining Groups being the Representative Elements

Periodic Trends 6: Representative (Main Group) Elements

 Correct for B.  There are two metalloids listed. 

 Correct for Si.  There are two metalloids listed. 

 Metalloids are sometimes called semimetals and lie along a zigzag line that divides metals and nonmetals. 

 Which of the following elements are classified as a metalloid? (Check all that apply.) 

State the element symbol found in the 6th Period and Group 7A.

TRANSITION METALS- Periodic Table

Transition and representative elements

Determine whether or not each element is a transition element.
a. Cr
b. Br
c. Mo
d. Cs

Determine the oxidation number of sulfur in each of the following
substances: (e) Locate sulfur in the periodic table in Exercise 4.47;
what region is it in?

Transition Metals & Representative Elements

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Millikan Oil Drop Experiment

The Oil Drop Experiment helped with determining the fundamental charge of the electron.&nbsp;

Ions

Ions represent elements that possess either a positive charge or a negative charge.&nbsp;

Periodic Table: Charges

Elements lose or gain electrons to have the ideal number of outer shell electrons like the noble gases.&nbsp;

Law of Definite Proportions

"Different samples of a pure chemical compound always contain the same proportions of elements by mass."

Periodic Table: Classifications

The Periodic Table contains 3 Major Classifications when describing its elements

Isotopes

Isotopes are atoms of an element that have the same atomic number, but different mass number.&nbsp;

The Atom

The atom represents the basic functional unit in chemistry

Mole Concept

The Mole Concept involves the interconversions between different unit amounts of a substance.

The Groups of the Periodic Table can be broken down into the Representative Elements and Transition Metals

Atomic Theory

John Dalton, one of the "Fathers of Chemistry"is credited with modernizing the Atomic Theory.

Subatomic Particles

The atom is composed of 3 subatomic particles:neutrons, protons, and electrons.

Periodic Table: Elemental Forms

The elements of the Periodic Table exist in different elemental forms in the natural world

Periodic Table: Phases

Under standard conditions of temperature and pressure, the elements can exist as solids, liquids or gases

Atomic Mass

The atomic mass of an element includes the masses of all 3 subatomic particles of neutrons, protons and electrons.&nbsp;

Periodic Table: Group Names

The Periodic Table can be further classified into Periods and Groups.&nbsp;

Law of Conservation of Mass

"In a chemical reaction, no matter is created or destroyed, but instead changes form."

Calculating Molar Mass

Molar Mass is a physical property that represents the mass of a substance divided by the amount of that substance.

Rutherford Gold Foil Experiment

The Gold Foil Experiment helped with the discovery of the positively charged nucleus.

Law of Multiple Proportions

“When 2 elements (A &amp; B) form different compounds, the mass of Element B that combine with 1 g of A are a ratio of whole numbers."

Periodic Table: Element Symbols

The Element Symbols of the Periodic Table represent the abbreviated form of an element

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