Font size
WorksheetsUnit 2 review
Total questions: 40
Worksheet time: 2hrs 18mins
Mass: 1 amu
Mass: 1 Amu
Mass: Almost Nothing
What is the mass of an electron?
1 amu
negligible
how many electrons does an uncharged atom of Neon have?
8
9
10
11
Which two components of an atom contribute to the mass?
Protons and neutrons
Protons and electrons
neutrons and electrons
Known for his Atomic Theory. This theory states that all matter is composed of extremely small particles.
Dalton
Thomas
Rutherford
Bohr
What is the mass number
Number of protons + Numbers of Neutrons,
Number of Neutrons + Number of electrons
Number of Protons
Number of Neutrons
What is the Atomic Number
Number of protons + Numbers of Neutrons,
Number of Neutrons + Number of electrons
Number of Protons
Number of Neutrons
the smallest particle of matter
element
mixture
compound
atom
molecule
a pure substance made up of only one type of atom and cannot be separated by physical or chemical processes
element
mixture
compound
matter
a substance that is a combination of pure substances but has not undergone a chemical change - it can be separated by physical means
element
mixture
compound
atom
two more atoms of different elements chemically bonded to form a new substance
element
mixture
compound
matter
identify the model
element
compound
mixture of element
mixture of compounds
mixture of elements and compounds
identify the model
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
identify the model
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
identify the model
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
identify the model
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
identify the model
element
compound
mixture of elements
mixture of compounds
mixture of elements and compounds
The atomic number of an element tells you the following. Check all that apply
Electrons
Mass
Neutrons
Protons
Why is salt classified as a compound?
It is not, it is a mixture.
It is not, it is an element.
It is two or more elements physically combined.
It is two or more elements chemically bond together.
How do you find the number of neutrons an element has?
Neutrons is equal to atomic mass.
Neutrons, protons, and electrons are the same.
Subtract atomic number from atomic mass, but leave mass and answer as a decimal.
Substract atomic number from atomic mass, but round mass and neutrons to the nearest whole number.
If you looked on your periodic table and find a "item" by itself you know it is the following.
element
compound
mixture
you need more information.
The gray dots outside the nucleus represent what subatomic particle?
atom
electron
neutron
proton
Why is chicken salad classified as a mixture? List all that apply.
It is uniform throughout.
It can be separated by physical means.
It is physically, but not chemically combined.
It's characterics change when bonded together.
Use your periodic table to find the atomic number, protons and electrons of Radon (Rn).
atomic number=86, protons=86, electrons=222
atomic number=222, protons=86, electrons=86
atomic number=86, protons=86, electrons=86
atomic number=222, protons=222, electrons=86
Where are neutrons and protons found within an atom?
A
B
C
How many electrons can be found in each layer of the electron cloud?
Layer 1=2, Layer 2=4, Layer 3=8, Layer 4=12
Layer 1=2, Layer 2=8, Layer 3=16, Layer 4=24
Layer 1=2, Layer 2=8, Layer 3=18, Layer 4=32
Number of electrons in each layer does not matter.
Use your periodic table to identify which element is represented.
Aluminum
Beryllium
Carbon
Lithium
