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Element, Compound, & Mixtures
Transcript of Element, Compound, & Mixtures
1. A substance in which there is only one type of particle (or molecule)
Anything that has mass and takes up space.
glass of distilled water
2. Particles of a pure substance are the same no matter where the substance is found
1. A pure substance that
be separated into a simpler substance by
2. Elements have a unique set of properties known as CHARACTERISTIC PROPERTIES
3. These properties classify elements as a METALS, NONMETALS, or METALLOIDS.
1. A pure substance composed of 2 or more elements that react with each other CHEMICALLY to form a NEW substance
2. Compounds have their own unique set of properties which is different from the elements that they are formed from.
3. Elements join is a specific ratio according to their masses.
C H O
3. Each item keeps its properties in the mixture and they can be
1. A combination of two or more pure substances that are
2. No chemical change takes place
Lots of PULP
1. If at least two of its particles (what it is made up of) are visible to the naked eye, even after shaking.
Two liquids such as water and oil
A liquid and solid: Water and Sand
Is it an...
Here We Go...
Oil and water
What are the subatomic parts of an atom?
What is the difference between a compound and molecule?
Which one is
What is an isotope?
The Periodic Table
HAS A ZERO CHARGE
HAS A POSITIVE CHARGE
PROTONS + NEUTRONS= THE NUCLEUS
HAS A NEGATIVE CHARGE
WHERE ELECTRONS ARE FOUND
How to Draw a
1. Determine the element you are drawing
2. Determine the number of
Protons, Neutrons, and Electrons
3. Determine how many energy levels.
QUESTION: In the
first energy level
you can only have
. How many electrons can you have in the other energy levels?
4. Fill in electrons on the energy levels appropriately .
HINT: What's Different?
Lewis Dot Structures
1. Write the Chemical Symbol has the " Nucleus"
2. Fill in VALENCE Electrons ONLY. Do this clockwise around the "imaginary" box around the symbol of the element you are drawing.
Oxygen has how many valence electrons?
Oxygen's Lewis Structure
What is an ION?
Name the Element and is it an Isotope?
An Ion is an atom with an extra charge
Atoms have an unequal number of protons and electrons resulting in a charged atom
protons > electrons = positive charge
protons<electrons = negative Charge
Hint:P + (-E) = Charge
What is the charge on these atoms?
What is a Bond?
An attraction between atoms
Caused by valence electrons (-) and atomic nuclei (+)
Why do atoms bond?
To complete outer electron level
To become more stable (happy)
1. IONic Bonding
TRANSFER of electrons
Formation of ions
Na + Cl NaCl
Sharing of electrons
Forms neutral molecules
Occurs between or within molecules
4. Polar Covalent
Unequal sharing of electrons
Forms polar molecules