1 / 13

Elements, Compounds and Mixtures

Elements, Compounds and Mixtures. Katina Peck. 3 categories of matter. Elements Compounds Mixtures. H 2 O. Pizza. Cu. Elements. Everything in the Universe is made from about 118 elements. Elements are the building blocks of matter. Cu.

adamp
Download Presentation

Elements, Compounds and Mixtures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Elements, Compounds and Mixtures Katina Peck

  2. 3 categories of matter • Elements • Compounds • Mixtures H2O Pizza Cu

  3. Elements Everything in the Universe is made from about 118 elements. • Elements are the building blocks of matter. Cu Each element is made up of the same type of atoms.

  4. Compounds • Compounds are made up of two or more different elements. • Compounds have different properties than the elements that make it up.

  5. H2O Compounds • Each compound is represented by a formula. • H2O= 2 Hydrogen & 1 Oxygen, 2:1 • CO2=1 Carbon & 2 Oxygen, 1:2 • NaCl= 1 Sodium & 1 Chlorine 1:1 • Chemically combined in a specific ratio.

  6. compounds • Formulas are made of the symbols and a subscript number. • The subscript is the number of atoms of that element. • A coefficient tells us how many molecules • there are. Subscript Coefficient

  7. Mixture • Most of the matter in the Universe is a compound or a mixture. • A mixture is made of two or more substances that are not chemically combined. • Substances in a mixture retain their properties.

  8. Mixture • Two types of mixtures: • Heterogeneous • Substances in the mixture are easily distinguished. • Pizza, trail mix, Italian salad dressing • Homogeneous • Two or more substances are uniformly mixed. • Salt water, the air we breath, soft drinks Heterogeneous Homogeneous

  9. Molecule • A molecule is formed when two or more atoms join together chemically. • If the molecule is made of two atoms of the same element, it is called a diatomic atom. • Di- two • Atomic- atom • Two atoms • H2 • O2

  10. Comparison • A molecule is formed when two or more atoms join together chemically. • A compound contains at least two different elements. • All compounds are elements, but not all elements are compounds.

  11. Solution • A homogeneous mixture. • Solute- the substance being dissolved. • Solvent- the substance that dissolves a solute. • Solubility- the amount of solute that will dissolve in a solvent. Solvent Solution Solute Solute

  12. Colloids • A heterogeneous mixture that never settles. • Example: Milk • Scatters light

  13. Suspension • A heterogeneous mixture that has particles that settle. • Example: Italian salad dressing

More Related