Regents Chemistry
Regents Chemistry Dr. Kramer
Chapter 2 ________________________
MATTER
Types of properties:
What is a physical change?
Examples:
What is a chemical change?
Examples:
Demo (swoosh bottle):
Observations:
Physical or chemical change?
Chemical Reactions
What can a chemical change produce?
We will focus on __________.
What are the two possibilities for ________ in a chemical reaction?
1.
2.
We can actually express this mathematically using a variable known as ___, which we will come back to later in the course.
Forms of Matter
Phases of Matter
1.
2.
3.
More on these phases later on in the course.
Let’s talk about the different ways in which matter exists in our world.
How do we differentiate between the following terms: mixture, substance, element, compound?
Mixtures
Definition:
Substance:
Heterogeneous Mixture:
Examples:
Homogeneous Mixture:
Examples:
Separating Mixtures
Filtration:
Examples:
Distillation:
Distillation of salt water:
[pic]
Elements and Compounds
Define element:
Examples:
Define compound:
What is meant by fixed proportion?
Examples of compounds:
Breaking Down Compounds
Must use _____________ change. ______________ changes will not break down a compound.
Example: Sugar
Sugar → Carbon + Water
Water → Hydrogen + Oxygen
Law of Conservation of Mass:
Exception:
Properties of Compounds:
Are they different than the properties of the elements that make them up?
Sodium chloride
Substance or Mixture?
Whole milk Olive Oil
Water Orange juice
Iron Stainless steel
Dry ice Salt
Symbols and Formulas
Alchemy Symbols Dalton’s Symbols
[pic]
Now, we use one and two-letter symbols for all elements. Here is the periodic table. Some elements are single letter. Others are two letters (second letter is lowercase). Look at the periodic table in your reference tables and find these elements.
H C O F
Na K Fe Cu
Ca Mg P S
N He Ne Ni
Will I have to memorize these?!?!?!
Chemical Formulas:
Subscripts are used to show how many atoms of each element exist in the compound.
Examples:
Water Carbon Dioxide
___ hydrogens and ___ oxygen
CONCEPT MAP
Place the following terms in a flow chart, illustrating which is the parent term, and which terms are subsets of the others:
Mixture Compound Heterogeneous Matter Substance
Element Homogeneous
CHEMICAL BINGO
Questions:
1. Zinc’s chemical symbol
2. Oxygen’s chemical symbol
3. N
4. dissolving salt in water
5. Sodium’s chemical symbol
6. 1 + 1
7. sugar ( caramel
8. mixture
9. Water’s chemical formula
10. CO2
11. element
12. compound
13. NaCl
14. physical change
15. distillation
Answers:
1. A means of separating substances by boiling
2. substance which contains two or more elements combined in definite proportions
3. physical change
4. The simplest form of matter with its own set of properties
5. nitrogen
6. Na
7. 2
8. Zn
9. chemical change
10. O
11. Two or more substances combined
12. H2O
13. carbon dioxide
14. salt
15. An operation performed on a substance which does not alter its composition (grinding, melting, etc.)
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- 10th grade global regents review
- nys global regents essay topics
- sample global regents essays
- global regents questions by topic
- global ii regents dbq
- global regents dbq essay
- global history regents dbq
- global regents essay examples
- global regents essay topics
- global regents thematic essay topics
- global 10 regents review
- global history regents nys