Atoms
What are the 3 main particles in an atom?
Protons, electrons and neutrons
Which atom is most reactive - use your periodic table
Lithium or Sulfur?
Lithium
In an atom which particle is responsible for bonding with other atoms?
Electrons
These change the appearance of the matter. Most of the matter’s properties stay the same
Physical Changes
Identify the parts of the equation:
reactive, product, subscript, coefficent, yields and element symbols.
See visual
How do you figure out the atomic number of an element?
the number of protons
What is each row called and what does it show on each element?
Each row on the table is called a period and shows elements with the same number of electron orbits.
Which of the following contains an ionic bond?
H2O or LiCL
LiCL
What are 2 examples of physical changes & chemical changes
all phase changes (liquid, solid, gas)
crumpling paper
chopping wood
tearing a cloth
bending a wire, dissolving sugar into tea.
toasting bread exploding fireworks
baking cookies,burning wood
rotting fruit, metal rusting
silver tarnishing. Dissolving salts in water (creates ions)
Visual #2 Balanced or Not?
Balanced
What are the charges for protons, nuetrons and electrons?
positive nuetral and negative
What is each column called and what does it show about the elements?
The columns, called groups, show elements that have similar chemical properties. This is because they have the same number of electrons in their outer orbit, which makes them behave in similar ways
What is a covalent bond? How is it formed?
Typically formed between nonmetal elements or nonmetals and metalloids. They share electrons to achieve stability.
These are physical combinations of substances.
Mixtures
Visual #3 Balanced or not
Not
What is a molecule?
A group of 2 or more atoms
Use the visual to answer this question- What is the number of protons this element has? What is the atomic number?
14
How is an iconic bond formed?
This is a trade between metals and nonmetals. Metals lose electrons and become positive ions, while non-metals gain electrons and become negative ions.
Changes result in the formation of new substances with different chemical properties.
Chemical Changes
Visual #4
Balanced or not?
Not
What are compounds?
Compounds are special kinds of molecules made from different elements.
Look at the visual of the bohr model determine what element it represents.
Oxygen
How is a covalent bond formed?
The goal of a covalent bond is to allow both elements to make sure their outermost orbital shell is completely filled up with 8 electrons.
These changes are usually very hard or impossible to reverse.
Chemical Changes
Visual 5 Balanced or Not
Balanced