unit 2 review - section 1 atomic structure and mass
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Unit 2 Review - Section 1Atomic Structure and Mass
Which subatomic particles are responsible for…
Element identity?Mass?
Charge?Chemical Behavior?
Which subatomic particles are responsible for…
Element identity? ProtonsMass? Protons and neutrons
Charge? Protons and electronsChemical Behavior? electrons
Which subatomic particles are found in the nucleus?
Which subatomic particles are found in the nucleus?
Protons and neutrons
Which subatomic particles have the smallest mass?
Which subatomic particles have the smallest mass?
Electrons
Which subatomic particles have a positive charge?
Which subatomic particles have a positive charge?Protons
Isotopes have the same number of protons, but different numbers of ________________.
Isotopes have the same number of protons, but different numbers of Neutrons
When you add up the protons and neutrons, do you getthe mass number or
the average atomic mass?
When you add up the protons and neutrons, do you getthe mass number or
the average atomic mass? Mass number
Which is found in the periodic table,the mass number or
the average atomic mass?
Which is found in the periodic table,the mass number or
the average atomic mass? Average atomic mass
An atom has 26 protons, 30 neutrons, and 26 electrons.
What is its atomic number?What is its mass number?
An atom has 26 protons, 30 neutrons, and 26 electrons.
What is its atomic number? 26What is its mass number? 56
An atom has 7 protons, 8 neutrons, and 7 electrons.
What element is it? What is its mass number?
An atom has 7 protons, 8 neutrons, and 7 electrons.
What is its atomic number? nitrogenWhat is its mass number? 15
For the isotope bromine-79,what is its mass number?
what is its atomic number?how many neutrons does it have?
For the isotope bromine-79,what is its mass number? 79
what is its atomic number? 35how many neutrons does it have? 44
For the isotope copper-64,how many neutrons does it have?
For the isotope copper-64,how many neutrons does it have? 35
For the isotope sodium-24,how many neutrons does it have?
For the isotope sodium-24,how many neutrons does it have? 13
For the isotope lithium-7,how many neutrons does it have?
For the isotope lithium-7,how many neutrons does it have? 4
For the isotope silver-109,write the isotope symbol?
For the isotope silver-109,write the isotope symbol?
Ag109
47
For the isotope potassium-41,write the isotope symbol?
For the isotope potassium-41,write the isotope symbol?
K41
19
For the isotope symbol below,write the isotope name?
Br81
35
For the isotope symbol below,write the isotope name?
Br81
35
Bromine-81
For the isotope symbol below,write the isotope name?
U238
92
For the isotope symbol below,write the isotope name?
U238
92
Uranium-238
Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium.
lithium-6 (mass = 6.01 amu, abundance = 7.6%) andlithium-7 (mass = 7.02 amu, abundance = 92.4%).
Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium.
lithium-6 (mass = 6.01 amu, abundance = 7.6%) andlithium-7 (mass = 7.02 amu, abundance = 92.4%).
Hint: First calculate the mass contributions of each isotope!
Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium.
lithium-6 (mass = 6.01 amu, abundance = 7.6%) andlithium-7 (mass = 7.02 amu, abundance = 92.4%).
Lithium-6: 6.01 amu x 0.076 = 0.46 amuLithium-7: 7.02 amu x 0.924 = 6.49 amu
Avg atomic mass = 0.46 + 6.49 =6.94 amu
For more practice…
• http://www.sciencegeek.net/Chemistry/taters/Unit1Numbers2.htm
• http://www.sciencegeek.net/Chemistry/taters/Unit1AtomicNumbers.htm
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