How are elements organized on the Periodic Table? S8P1f. Recognize that there are more than 100 elements and some have similar properties as shown on the Periodic Table of Elements
Background Information Scientists in the early 1860s had a similar problem like the mixed up DVDs when looking at Elements. Dmitri Mendeleev discovered a pattern to the Elements in 1869. Mendeleev found that when elements were arranged by similar properties, the pattern was periodic (repeating every seven elements).
Therefore, the name The Periodic Table of Elements. During the lesson, use the Elements on the Periodic Table Notes to record your information. Elements on the Periodic Table Notes
Name_______________________ Date ________ Period ___ 1. The Periodic Table represents our understanding of the _________________________ that have been identified in our environment. 2. The Periodic Table contains _____________________________________. 3. 4. What happens to the Atomic Number of Elements as you move Left to Right, Up to Down on the Periodic Table? ________________
5. The Periodic Table is organized like a ____________. The properties of an element can be predicted from ____________________. 6. The Periodic Table can also be divided into three main types of Elements: ______________________________________________ 7. Metals can be described as: 8. Nonmetals can be described as: 9. Metalloids can be described as: 10. Each horizontal row of the Periodic Table is called a _______. Each row represents the __________________________________. 11. Each column of the Periodic Table is called a ________. The Elements in a group have __________________________________. 12. Elements on the left of the Periodic Table are _________________________, ____________________ in the middle,
______________ on the right. What is the Periodic Table? It represents our understanding of the structure and usefulness of the atoms that have been identified in our environment Elements are organized on the Periodic Table based on similar properties
Picture from www.chem4kids.com The Periodic Table contains over 100 different Elements What do the numbers and
Letters mean? What do the numbers and Letters mean? Element Name Atomic Number Elements
Chemical Symbol Atomic Mass Atomic Number: The number of protons in its atom.
Atomic Mass: The mass of one atom of the element What do you notice about the Atomic Number of Elements as you move Left to Right and Up to Down on the Periodic Table of Elements?
4. The Atomic Mass Increases So how is the Periodic Table arranged?
The Periodic Table is organized like a 5.big grid. The properties of an element can be predicted from its location in the Periodic Table
There are rows (left to right) and columns (up and down). Each row and column mean something different. The Periodic Table can also be divided into three main types of Elements: 6. Metals, Metalloids, and
Nonmetals Complete #13 on your Notes Sheet Metals
Metals are shiny Metals are solid at room temperature
Metals have high conductivity Metals can be flattened and not shatter (malleable) Nonmetals
Nonmetals are not shiny Nonmetals are mostly
gaseous at room temperature Nonmetals are poor conductors Nonmetals are brittle and will shatter easily (not malleable or ductile)
Metalloids Metalloids have characteristics between metals and nonmetals Metalloids are solid at room temperature Metals are semi-conductors
Periods Each horizontal row of the table is called a period
Each row represents the number of energy levels present in an atom of the element
Groups (Families) The Columns are
called Groups There are 18 groups The Elements in a group have the same number of electrons in their outer energy level Groups are often grouped together to
form Families because of similar properties Groups (Families) You probably know a family with several members who look a lot alike. The Elements in a group or family in the periodic table often-but not
always-have similar properties. Complete #14 on your Notes Groups (Families) Although you are not expected to know the names of the similar family (groups), here is a quick glance.
[Names vary depending on source] Hydrogen The properties of Hydrogen do not match the properties of any single group, so it is set apart. It is above Group 1 because it has 1 electron in its outer energy level like Group 1.
Alkali Metals Alkaline-Earth Metals Transition Metals Boron Group
Carbon Group Nitrogen Group Oxygen Group Halogen Group
Noble Gases Rare Earth Elements Distributed Summarizing It is tough to remember the difference between a Period and a Group on the Periodic Table.
With a partner, come up with a strategy for remembering the difference between a Period and a Group. Keep in mind the similar properties of each. Periodic Table and States of Matter Most Periodic Table models also indicate whether
an element is a solid, liquid, or gas. Complete #15 on your Notes Lets Review the Basics of the Periodic Table http://
studyjams.scholastic.com/studyjams/j ams/science/matter/periodic-table.ht m Reactivity of Elements Atoms will often take, give, or share electrons with other atoms in order to have a complete set of electrons in their outer energy level.
Elements whose atoms undergo such processes are called Reactive and can combine to form compounds. Since Groups [columns] are similar because they have the same number of electrons in their outer energy level, the Periodic Table is also organized by degree of reactivity. Reactivity of Elements
Reactivity of Elements In general, Elements located on the left of the Periodic Table are most reactive metals, least reactive metals in the middle, and nonmetals on the right.
Distributed Summarizing Elements whose atoms take, give, or share electrons are called Reactive and can combine to form compounds. How could you compare Reactive Elements to people who are active on social media [Facebook, Instagram, Twitter, Snap Chat, etc]?
Using those thoughts, identify an Element that would be very active on social media. Identify an Element that would not join in social media. Explain Why. Complete #16 on your Notes *Gas
**Liquid Summarizing Strategy 3-2-1 Name at least 3 ways the Periodic
Table is organized Identify the 2 numbers given for each element Identify the main purpose of the Periodic Table
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