Matter and Energy It’s elemental!.

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Presentation transcript:

Matter and Energy It’s elemental!

Atoms The most basic component of all matter. The smallest particle of an element that has ALL the chemical properties of that element. Made of a nucleus of protons and neutrons surrounded by electrons.

Elements Matter made of a SINGLE type of atom. They CANNOT be broken down into different kinds of matter. Quick Facts: 118 Elements known or predicted 90 formed by nature, 28 created in laboratories All are classified in the Periodic Table of the Elements

Periodic Table Elements are written as symbols H = Hydrogen He = Helium Elements are written as symbols Usually represented by 1-2 letters The first letter is always capitalized The second letter is lower case

Periodic Table Elements are arranged by atomic number Columns Rows Represent families 7 Rows Represent periods Rows

Periodic Table Elements are divided by properties Metals on the left Shiny, conductors, malleable Nonmetals on the right Dull, not conductors, brittle Metalloids are the dotted stair step They have characteristics of both metals and nonmetals

Metals, Nonmetals, and Metalloids Shiny Malleable Good conductors of heat and electricity Why?: They have the ability to easily move electrons to their outer shells. Ex: Al – Aluminum Au – Gold Dull Brittle Poor conductors of heat and electricity Why?: They gain electrons easily. Cl – Chlorine Ne - Neon Have properties of both metals and nonmetals Good semiconductors Boiling points, melting points, and densities vary Si – Silicon B - Boron

Compounds and mixtures A substance containing two or more substances MIXED together. Can be separated by mechanical means. The two or more substances are mixed in a way that each remains UNCHANGED. Example: Salad Dressing Compound A substance formed from two or more elements with a fixed ration determining the composition. The elements lose their individual properties and the new compound has new properties. Examples: Water (Hydrogen and Oxygen) Salt (Sodium and Chlorine)

Elements essential to life CHONPS: C H O N P S arbon ydrogen xygen itrogen hosphorus ulfur These elements are found in abundance on solid Earth, in the atmosphere, and in the oceans.

The Earth’s Crust Notice how the same element, oxygen, makes up the majority of both the Earth’s crust and the human body. This displays how essential oxygen is to both life and Earth.

Abundance of Elements in soil, Sea, and Plant Life The bar graph shows the abundance of elements in the Earth’s crust, ocean, and plants. This graph shows that in addition to CHONPS there are other elements that occur frequently in the composition of life and earth. Can you name one of these elements besides CHONPS?

Now it’s your turn to test your knowledge! On the next few slides you will see a series of pictures, on your “Matter and Energy” student worksheet write if the picture represents an element, compound, or mixture. Remember: An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances physically joined together. Element? Compound?

Element, Compound, or Mixture? Pure Water

Element, Compound, or Mixture? Diamond

Element, Compound, or Mixture? Gold

Element, Compound, or Mixture? Chex Mix

Element, Compound, or Mixture? Salt

Element, Compound, or Mixture? Neon

Element, Compound, or Mixture? Skittles

Element, Compound, or Mixture? Sugar

Element, Compound, or Mixture? Stir-Fry

Element, Compound, or Mixture? Sand