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Chemistry Concepts: Atomic Structure and Isotopes Part 2

Chemistry18 CardsCreated 4 months ago

This deck covers key concepts related to atomic structure and isotopes, focusing on naturally occurring isotopes, atomic mass calculations, and elemental properties.

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Silver has two naturally occurring isotopes (Ag−107 and Ag−109).

Express your answer using five significant figures.
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Key Terms

Term
Definition
Silver has two naturally occurring isotopes (Ag−107 and Ag−109).
Express your answer using five significant figures.
Use the periodic table to find the atomic mass of silver. Express your answer using five significant figures.
Atomic mass of silver is 107.87
If the natural abundance of Ag−107 is 51.84 %%, what is the natural abundance of Ag−109?
Express your answer using four significant figures. 48.16%
If the mass of Ag−107 is 106.905 amu, what is the mass of Ag−109? Express your answer using four significant figures.
Atomic mass- 108.949
Which one of the following is a main-group nonmetal element in period number 4 of the periodic table?
Bromine is the main group nonmetal element in period number 4 of the periodic table.
What is the charge on a calcium atom that contains 18e−e−?
2+
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Chemistry Concepts: Atomic Structure and Isotopes Part 2
TermDefinition
Silver has two naturally occurring isotopes (Ag−107 and Ag−109).
Express your answer using five significant figures.
Use the periodic table to find the atomic mass of silver. Express your answer using five significant figures.
Atomic mass of silver is 107.87
If the natural abundance of Ag−107 is 51.84 %%, what is the natural abundance of Ag−109?
Express your answer using four significant figures. 48.16%
If the mass of Ag−107 is 106.905 amu, what is the mass of Ag−109? Express your answer using four significant figures.
Atomic mass- 108.949
Which one of the following is a main-group nonmetal element in period number 4 of the periodic table?
Bromine is the main group nonmetal element in period number 4 of the periodic table.
What is the charge on a calcium atom that contains 18e−e−?
2+
How many electrons does the predictable (most common) ion of sodium contain?
10 Sodium (atomic number 11) contains 11 protons and 11 electrons. Sodium forms a 1+ ion by giving away 1 electron, giving the ion a total of 10 electrons.
How many neutrons are found in K-40?
K(potassium)-40= 21 neutrons 19(atomic number)-40=21
How many protons are found in C-14?
C(carbon)-14= 6 protons + 8 neutrons= atomic mass of 14.
Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769 amu and a natural abundance of 92.21 %%, SiSi-29 with mass 28.9765 amu and a natural abundance of 4.69 %%, and SiSi-30 with mass 29.9737 amu and a natural abundance of 3.10 %%. Express your answer using four significant figures.
28.089 amu Calculate the atomic mass of silicon by taking its weighted average, which is the sum of the masses of each isotope multiplied by its natural abundance in decimal form. To convert the given percentages of each isotope, divide the percentage by 100. atomic mass =∑(isotopic abundance)×(isotopic mass)=92.21100(27.9769)+4.69100(28.9765)+3.10100(29.9737)= 28.09amu
Which of the following is NOT part of Dalton's Atomic Theory?
Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.
An atom containing 7 protons, 8 neutrons, and 7 electrons:
is charge-neutral.
Which of the following subatomic particles has a mass of 1.67 ×× 10-27 kg?
Protons and neutrons
Group 7A elements are also called:
Halogens
Group 8A elements are also called:
Noble gases
Metalloids are located where on the periodic table?
Zig-zag diagonal line of the periodic table
Which of the following statements about ions is INCORRECT?
Cations always have the same number of protons as electrons.
A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: The calculated atomic mass of Nivadium is:
22.83 amu