2/22/10

Key Question 12 Exit Slip Check

Pair and Share…

KEY QUESTION 11: What is the periodic table and how is it organized?

•Identify the 4 things in every box on the periodic table and what they tell you about the particles that make up an atom of that element.

•The atomic number for boron is _____. The atomic mass is _____.

•Boron has _____ protons, _____ neutrons, and _____ electrons.

•Describe how the periodic table is organized.

•Elements are in order by ____________________ ___________________ on the periodic table.

•Define groups and periods and explain what elements in the same group and period have in common.

•Vertical columns are called ____________________ or ____________________ and contain elements with similar ____________________ ____________________.

•Horizontal rows are called ____________________ and contain elements with the same number of ____________________.

•The ____________________ ____________________ in group 1 are the most reactive metals.

•The ____________________ ____________________ ____________________ in group 2 are also very reactive metals.

•The transition metals in groups 3-12 are ____________________ reactive metals.

•The ____________________ in group 17 are very reactive non-metals.

•The noble gases in group 18 are ____________________ and ____________________.

5

BBoron

11

55 56

Atomic Number

Groups FamiliesChemical PropertiesPeriods

Electron ShellsAlkali Metals

Alkaline Earth MetalsTransition

MetalsHalogens

Stable Unreactive

11

KEY QUESTION 12: What is a chemical reaction

•Describe what happens to molecules in a chemical change.

•The number of atoms before and after a chemical change __________________________________.

•Which of the following shows a correct equation for a chemical reaction?

•Explain and define chemical equations, reactants, and products.

•Circle the reactants and put a box around the products in the following chemical equations.

•Identify, describe, and give examples of the 5 signs of a chemical change.

•Complete the table below showing the 5 signs of a chemical change and give an example for each.

+ +OR

2H2O 2H2 + O2

Sign Indicating Chemical Change Example

remains the same

Energy (temperature & light)Color changeOdor changeGas formedSolid formed

HotHands or Glow SticksRusting, Heating Sugar

Rotting Milk or Burning CandleElectrolysis of Water

Electrolysis Rusting Reaction

Today’s Agenda

• Warm-Up: Key Question 12 Exit Slip: Pair and Share

• Classwork:– CyberEd: Chemical Reactions

• Homework:– Study for Quiz Tomorrow– Complete Key Question 12

• Conclusion:– Identify the reactants and products in a

chemical reaction.

Student ObjectiveFriday, April 21, 2023

Students will be able to…• Describe what happens during a

chemical reaction.• Identify the 5 signs of a

chemical reaction.• Explain what a chemical

equation tells you about a reaction.

Rates of Reaction

What can be done to speed up or slow down a chemical reaction?

•The number and type of atoms before a reaction is the same as the number and type of atoms after the reaction.

•Molecules simply unhook, the atoms rearrange and recombine to form new substances.

•A chemical equations is a representation of a chemical reaction using numbers and symbols.

•Reactants are what you have at the start of a reaction (on left side of equation).

•Products are what you have at the end of a reaction (on right side of equation).

•5 signs of a chemical reaction tell you that a reaction MAY have occurred.

•Energy change includes a change in temperature or light being produced.

•The only way to know for sure that a chemical reaction has taken place is if a new substance is formed.

What are the reactants for the equation below?

Fe + CuSO4 Cu + FeSO4

20% 20% 20%20%20%

???

A. IronB. CopperC. Iron and Copper

SulfateD. Copper and Iron

SulfateE. Iron and Copper

Iron Copper Sulfate Copper Iron Sulfate