Atoms and Matter
Elements, Compounds, and Mixtures
Periodic Table
Physical and Chemical Changes
Balanced Equations
100
What are the 3 particles found in the atom? What is their charge? Where are they found?
1. electrons, negative, outer shells 2. neutrons, neutral, in nucleus 3. protons, positive, in nucleus
100
What is made up of only one type of atom?
What is an element
100
Letters on the periodic table are called
What is a chemical symbol
100
Physical or chemical change? Salt dissolves in water?
What is a physical change (it is still salt water)
100
Is this balanced or unbalanced? Fe + Cl2 --> FeCl3
What is unbalanced To balance it it would be 2Fe + 3Cl2 --> 2FeCl3
200
How do you determine how many protons an atom has?
What is the atomic number?
200
A mixture that is the same throughout.
What is a homogeneous mixture
200
The period number on the Periodic Table of Elements tells you what about the atom?
What is the number of outer shells (orbitals)
200
Physical or chemical change? Food is digested in the stomach
What is a chemical change (digestion is chemical, we are creating new substances by breaking down food)
200
Balanced or unbalanced: Na + Cl2 --> NaCl
What is unbalanced Balanced: 2Na + Cl2 --> 2NaCl
300
How do we determine how many electrons are in an atom?
What is the atomic number? The atomic # = # of protons = # of electrons
300
What is made up of 2 or more atoms?
What is a compound?
300
The group number on the Periodic Table of Elements tells you what about the atom?
What is the number of valence electrons
300
Physical or chemical change? Milk sours or food spoils.
What is chemical change (new substance is formed)
300
What type of chemical reaction is 4 Al + 3 O2 --> 2 Al2O3? a. decomposition b. synthesis c. single replacement d. double replacement
What is b. synthesis
400
How do you calculate the number of neutrons in an atom?
What is subtract the atomic number from the atomic mass. Ex. Atomic mass - Atomic number Na: 23 - 11 = 12 neutrons
400
What is a mixture that is different throughout and easily separated?
What is a heterogeneous mixture
400
The Periodic Table of elements is organized by the _________ _____________.
What is the atomic number
400
Physical or chemical change? Water freezes at 0 degrees C
What is a physical change (Phase change)
400
What type of chemical reaction is 2 NaOH + H2SO4 --> Na2SO4 + 2 H20? a. decomposition b. synthesis c. single replacement d. double replacement
What is d. double replacement
500
What are valence electrons?
What is electrons in the outer most shell.
500
What is Density?
What is Density = mass/volume (D=m/v)
500
Who was the first scientist to organize the Periodic Table of Elements?
Who is Dmitri Mendeleev
500
Physical or chemical change? Cooking an egg, baking a cake
What is a chemical change (cooking food produces a new substance)
500
What type of chemical reaction is 2 KClO --> 2 KCl + 3 O2? a. decomposition b. synthesis c. single replacement d. double replacement
What is a. decomposition
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