What are each of these tools used for?

You need 11 different colors

Families on the Periodic Table Elements on the periodic table can be grouped into families bases on their chemical properties. Each family has a specific name to differentiate it from the other families in the periodic table. Elements in each family react differently with other elements.

Families on the Periodic Table The horizontal rows are called periods and are labeled from 1 to 7. The vertical columns are called groups or families and are labeled from 1 to 18.

How are Atomic Number and Atomic Mass related?

Hydrogen Hydrogen belongs to a family of its own. Hydrogen is a diatomic, reactive gas. Hydrogen was involved in the explosion of the Hindenberg. Hydrogen is promising as an alternative fuel source for automobiles color hydrogen color 1

ALKALI METALS Group 1 Hydrogen is not a member, it is a non-metal 1 electron in the outer shell Soft and silvery metals Very reactive, esp. with water Conduct electricity Color the rest of this group color 2

ALKALINE EARTH METALS Group 2 2 electrons in the outer shell White and malleable metals Reactive, but less than Alkali metals Conduct electricity Color the Alkaline Earth Metals color 3

TRANSITION METALS Groups 3-12 Good conductors of heat and electricity. Some are used for jewelry. The transition metals are able to put up to 32 electrons in their second to last shell. Can bond with many elements in a variety of shapes. Color Transition Metals color 4

Transition Metals Elements in groups 3-12 Less reactive harder metals Includes metals used in jewelry and construction. Metals used “as metal.”

BORON FAMILY Group 13 3 electrons in the outer shell Most are metals Boron is a metalloid Color Boron Family color 5

CARBON FAMILY Group 14 4 electrons in the outer shell Contains metals, metalloids, and a non-metal Carbon (C) Color Carbon Family with color 6

Carbon Family Contains elements important to life and computers. Carbon is the basis for an entire branch of chemistry. Silicon and Germanium are important semiconductors.

NITROGEN FAMILY Group 15 5 electrons in the outer shell Can share electrons to form compounds Contains metals, metalloids, and non-metals Color the nitrogen family with color 7

Nitrogen Family Elements in group 15 Nitrogen makes up over ¾ of the atmosphere. Nitrogen and phosphorus are both important in living things. Most of the world’s nitrogen is not available to living things. The red stuff on the tip of matches is phosphorus.

OXYGEN FAMILY Group 16 6 electrons in the outer shell Contains metals, metalloids, and non-metals Reactive Color the Oxygen family with color 8

Oxygen Family or Chalcogens Elements in group 16 Oxygen is necessary for respiration. Many things that stink, contain sulfur (rotten eggs, garlic, skunks,etc.)

Halogens Group 17 7 electrons in the outer shell All are non-metals Very reactive are often bonded with elements from Group 1 Color the Halogen group with color 9

Halogens Elements in group 17 Very reactive, volatile, diatomic, nonmetals Always found combined with other element in nature . Used as disinfectants and to strengthen teeth.

Noble Gases Group 18 Exist as gases Non-metals 8 electrons in the outer shell = Full Helium (He) has only 2 electrons in the outer shell = Full Not reactive with other elements Color the noble gases with color 10

The Noble Gases Elements in group 18 VERY unreactive, monatomic gases Used in lighted “neon” signs Used in blimps to fix the Hindenberg problem. Have a full valence shell.

Rare Earth Metals Some are Radioactive The rare earths are silver, silvery-white, or gray metals. Conduct electricity Color Rare Earth Metals with color 11

Why are these funny?

Unit 3, Lesson 6 PHYSICAL SCIENCE It’s all a BALANCING act

Law of Conservation of Mass What is the law of conservation of mass? How does this law apply to chemical reactions?

4 Steps to Balancing an Equation WRITE THIS DOWN… 1. Write the chemical equation with chemical symbols. 2. Count the number of atoms of each element on both sides of the equation. 3. Balance atoms using coefficients. A coefficient is a number placed before the element or compound. 4. Check to make sure the equation is balanced.

Let’s Try It… 1. Write the chemical equation with chemical symbols. 2. Count the number of atoms of each element on both sides of the equation. 3. Balance atoms using coefficients. A coefficient is a number placed before the element or compound. 4. Check to make sure the equation is balanced.

Using a Table to Help Balance Type of Atom Reactants Products

Balance with me…

What about this one?

Ok on your own now… http://funbasedlearning.com/chemistry/chemBalancer/