Do Now. Matter Intensive/Extensive Physical/Chemical Property

Transcription

1 Do Now Matter Intensive/Extensive Physical/Chemical Property

2 Catalyst What does the word pure mean to you? Give an example of something that is pure and explain why it is pure. Give an example of something that is NOT pure and explain why it is not pure.

3 Vocabulary Substance Mixture Element Compound Heterogeneous Mixture Homogeneous Mixture

4 Essential Questions 1. What properties are used to describe matter? 2. How can matter change its form?

5 Unit 0: Foundations of Chemistry 2 MATTER & CHANGE 2.3 Elements, Compounds, Mixtures

6 1 Classification of Matter MATTER Substances Definite Composition Mixtures Variable composition Elements Compounds Homogeneous Mixture (solution) Uniform Heterogeneous Mixture Nonuniform Mercury (Hg) Mercury sulfide (HgS) Air Salad

7 2 Element Element-smallest form of matter with unique properties

8 3 Compound Compound-a substance that contains 2 or more different elements in a fixed proportion. Ex: H 2 O

9 4 Element v Compound Compound can be broken down chemically into simpler substances, but an element cannot. electrolysis H 2 O H + O Compound Elements

10 Element or Compound? 2 Copper sulfate (CuSO 4 ) Magnesium 5

11 5 Mixtures Mixture: a combination of two or more substances. Ex: salad

12 Mixtures: Other examples

13 6 Types of Mixtures Heterogenous Mixture: composition is not uniform. (you see more than 1 material)

14 7 Types of Mixtures Homogenous Mixture: Composition is uniform. (you see only 1 material) Homogeneous mixtures are also called solutions.

15 Types of Mixtures-Practice homogeneous or heterogeneous mixtures?

16 Types of Mixtures-Practice homogeneous or heterogeneous mixtures?

17 Types of Mixtures-Practice homogeneous or heterogeneous mixtures?

18 Types of Mixtures-Practice Classify as homogeneous or heterogeneous mixtures

19 Atoms (Elements) Molecules Compounds Particle Substances Diagrams Mixtures Elements Molecules Compounds Element Molecule Compound Element + Molecule Element + Compound Molecule + Compound

20 2.3 Elements, Compounds, Mixtures Notes 1. Element: smallest form of matter with unique properties. Ex: Gold, Magnesium, Oxygen, etc. 2. Compound: is a substance that contains 2 or more different elements in a fixed proportion. Ex: Water (H 2 O). 3. Compounds can be broken down chemically into simpler substances, but elements cannot. H 2 O electrolysis H 2 + O 2 4. Mixture is a physical blend of two or more substances. Ex: Salad 5. Heterogeneous Mixture: composition is not uniform; you see more than one material. Ex: Salad, Muddy Water 6. Homogeneous Mixture: Also called Solutions. composition is uniform; you see only one material. Ex: Coke, Sugar solution.

21 Exit Ticket 1. Match the picture with the following descriptions: Atoms of an element Molecules of an element A mixture of two elements, both of which are made of atoms. A compound 2. Both CO and CO 2 are (elements, compounds, mixtures). Explain why they are not the same thing. 3. Why is Tylenol, also know as acetaminophen, with a formula of C 8 H 9 O 2 N, a compound? $ a$ $ $ $! 4. What are the elements in acetaminophen in this compound? b$ $ $ $ 1. Atoms of an element c$ d$ 5. How could pharmacists make Tylenol a mixture instead of a compound?

22 Compounds Mixtures Elements Atoms Molecules atoms of different elements molecules of a compound Particle Diagrams molecules of different elements molecules of a compound

23 Compounds Mixtures Elements Atoms Molecules atoms of different elements molecules of a compound Particle Diagrams molecules of different elements molecules of a compound

24 Matter Substances Mixtures Element Compound Homogenous Heterogenous z Mercury (Hg) 1 element only Mercury sulfide (HgS) 2 different elements Mercury + Sulfur Olive oil (contains many different compounds) Salad (contains vegetables, nuts, oil, etc)