Atoms, Elements, Molecules, Compounds Note
Atoms : An atom is the ___________ particle of an element that still has the properties of that element.
All matter is made of ____________________ even you.
Atoms are structures ____________________________ for us to see, even with aid of a microscope.
Because we can’t see atoms, we use___________________ to help us study and understand them
Atomic Model :We often use_____________________ to represent atoms and put them together to represent molecules.
Some use a bar or a line to represent the_______________________ between the atoms and some don’t.
Example
Elements:An _________________________________________is a substance made of only one kind of atom.
Elements can be ____________________________to form new substances.
Example
Molecule: A ____________________________________ is formed when 2 or more atoms bond together.
If a molecule is made up of only 1 kind of atom we call it an _________________________________.
If the molecule is made up of 2 or more kinds of atoms we call it a ____________________________
Atoms of elements often ______________________________ together to form molecules.
Atoms of oxygen bond together to form oxygen _________________________________or O2.
Hydrogen molecules are formed when 2 hydrogen atoms _____________________ together.
Sulfur molecules are formed when 8 sulfur atoms _______________________ together.
This molecule is made of only 1 kind of atom so it is considered an ________________________________
Compound: A _______________ is two or more elements joined together by a chemical bond.
Water is an example of a ______________. Each molecules is made up of _____________atom and ___________ atoms.
Example
Sugar Molecule
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The simple sugar glucose is a compound made up of _____________________________ atoms,
_____________________ atoms, and ________________________ atoms.
Example
Glucose
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Glucose is a product of_____________________________________. Atoms are ______________________
to produce oxygen and glucose.
Example: Glucose equation and Photosynthesis equation
Compound Properties
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The _______________________________________ of a compound are often very __________________ from
the elements they are made up of.
For example, at room temperature hydrogen and oxygen are both __________________________but water is a
__________________________.
Example
Covalent Bond : formed when _______________________________________________________________________________________;
usually ____________________________________________________________________________
A water molecule is an example of the _________________________ covalent bond between ____________________ and
__________________.
Example-Covalent Bond
Example-Water Molecule
Ionic Bond
An IONIC BOND is an ____________________________________ that holds together a positively charged ion
(________________________) and a negatively charged ion (______________________________________)
Example- Ionic Bond
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the result of the _______________________________________________________ of oppositely charged ions (between
_____________________ and _______________________________________ of electrons)