Presentation is loading. Please wait.

Presentation is loading. Please wait.

What is Matter?.

Similar presentations

Presentation on theme: "What is Matter?."— Presentation transcript:

1 What is Matter?

2 CHEMISTRY- the scientific study of the composition, structure, and properties of matter and the changes that matter undergoes MATTER- anything that has mass and take up space Ex of matter: (class will give examples and write them down) Light and sound are matter? Why?

3 ELEMENT- a substance that cannot be separated or broken down into simpler substances by chemical means Each element is made of only one kind of ATOM ATOM- smallest unit of an element that maintains the properties of that element Symbols for elements are always a single capital letter or a capital letter followed by a lowercase letter (ex: carbon- C, iron- Fe, copper- Cu, aluminum- Al)

4 Earth and the human body differ in the kind and proportion of elements are composed of
COMPOUND- a substance made of atoms of two or more different elements that are chemically combined (give one example)

5 A water molecule can be represented by a formula, physical models, or computer images
Every compound is different from the elements it contains (ex: the elements hydrogen oxygen, and nitrogen are colorless gases, but when combine with carbon to form nylon, the strands of nylon are flexible solid)

6 MOLECULE- the smallest unit of a substance that keeps all of the physical and chemical proprieties of that substance (the smallest unit of a substance that behaves like a substance) A water molecule is made of two hydrogen and one oxygen atom Most molecules are made of atoms of different elements, but also be made of atoms of the same element:

7 CHEMICAL FORMULA- a combination of a chemical symbols and numbers to represent a substance
Ex: Indigo is the dye first used to turn jeans blue, the chemical formula of indigo is shown in fig., and it is made of 4 elements and 30 atoms In a chemical formula, the number of atoms of each element is written after the element’s symbol

8 Numbers placed in front of a chemical formula show the number of molecules
Three molecules of table sugar are written as: 3C12H22O11, each molecule of sugar contains 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms Ex: How many elements and atoms have : acetic acid C2H4O2, glucose C6H12O6, table salt (sodium chloride) NaCl, water H2O

9 PURE SUBSTANCE- a sample of matter, either a single compound that has definite chemical and physical proprieties Pure= not mixed with anything Pure substance is matter that has a fixed composition and definite proprieties Ex:- water is a pure substance made up of elements hydrogen and oxygen, which are chemically combined - grape juice, the components, such sugar and water are not chemically combined

10 Grape juice is a MIXTURE
A MIXTURE- a combination of two or more substances that are not chemically combined A mixture may have proprieties that are similar to the pure substance that form it (Ex: grape juice: liquid (water), sweet (sugar) Some mixtures are made by putting solids and liquids together

11 Lab: determine differences between given mixtures
Draw a table: Substance 1 Substance 2 Observations Combine, sugar with water, flour with water, sand with water, and syrup with water Write in the table observations, and write down the conclusions

12 HOMOGENEOUS ( homo- the same)- the substance are evenly distributed (a sample from the bottom of a glass should have the same composition as a sample from the top) HETEROGENEOUS (hetero: different)- the substances aren’t mixed uniformly, and are not evenly distributed From the lab examples, which examples are homogeneous, and which are heterogeneous, write down the reason

Download ppt "What is Matter?."

Similar presentations

Ads by Google