Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chapter 2, Section 2. Interactions of Atoms Compounds – Atoms of more than one type of element that have been chemically bonded together – Often have.

Similar presentations


Presentation on theme: "Chapter 2, Section 2. Interactions of Atoms Compounds – Atoms of more than one type of element that have been chemically bonded together – Often have."— Presentation transcript:

1 Chapter 2, Section 2

2 Interactions of Atoms Compounds – Atoms of more than one type of element that have been chemically bonded together – Often have different properties than the elements that formed them

3 Interactions of Atoms Chemical Formulas – Show the ratios and types of atoms in a compound NaCl H 2 0 HCl

4 Interactions of Atoms Chemical Properties – Describe changes that occur when one substance reacts with another substance

5 Bonding Chemical Bond – Force that holds atoms together in a compound – Form when atoms share or exchange electrons in their outermost energy level Outer energy level is considered stable (and wont form bonds) when it has 8 electrons

6 Bonding Covalent Bonds – Form when atoms share the electrons in their outermost energy levels

7 Bonding Molecule – Group of atoms connected by covalent bonds

8 Bonding Ionic Bonds – Form when oppositely charged ions join together to form a neutral compound

9 Bonding Metallic Bonds – Occur in metals – Electrons are free to move from one positively charged ion to another Results in conductivity

10 Bonding Polar Molecules – Molecules with slight positive and negative charges due to unequal sharing of electrons Example: Water

11 Bonding Hydrogen Bonds – Weak bonds formed between the negative end of one water molecule and the positive end of another water molecule

12 Mixtures Mixture – Two or more substances that are not chemically combined

13 Mixtures Heterogeneous Mixtures – Not mixed evenly – Each component retains its own properties

14 Mixtures Homogeneous Mixtures – Evenly mixed – Properties of the components are often different from the properties of the mixture – Often called a solution

15 Separating Mixtures and Compounds Mixtures vs. Compounds – Mixtures can be separated by physical means – Compounds must be separated by chemical means


Download ppt "Chapter 2, Section 2. Interactions of Atoms Compounds – Atoms of more than one type of element that have been chemically bonded together – Often have."

Similar presentations


Ads by Google