Podcast
Questions and Answers
What is the correct formula to calculate the relative atomic mass of an element with isotopes A, B, and C?
What is the correct formula to calculate the relative atomic mass of an element with isotopes A, B, and C?
- Relative atomic mass = (A% x Ma) + (B% x Mb) + (C% x Mc) (correct)
- Relative atomic mass = (B% x Mb) + (C% x Ma) + (A% x Mc)
- Relative atomic mass = (A% x Mb) + (B% x Mc) + (C% x Ma)
- Relative atomic mass = (A% x Mc) + (B% x Ma) + (C% x Mb)
If the relative abundance of the isotopes of chlorine is 75% for $^{35}$Cl and 25% for $^{37}$Cl, what is the relative atomic mass of a chlorine atom?
If the relative abundance of the isotopes of chlorine is 75% for $^{35}$Cl and 25% for $^{37}$Cl, what is the relative atomic mass of a chlorine atom?
- 34.5
- 36.5
- 35.5 (correct)
- 37.5
Which of the following isotopes has the highest relative abundance in chlorine isotopes described?
Which of the following isotopes has the highest relative abundance in chlorine isotopes described?
- $^{37}$Cl
- $^{35}$Cl (correct)
- $^{34}$Cl
- $^{39}$Cl
What relative atomic mass is given for bromine based on the isotopes $^{79}$Br and $^{81}$Br?
What relative atomic mass is given for bromine based on the isotopes $^{79}$Br and $^{81}$Br?
Which isotope mass corresponds to the known relative abundance of 25% for chlorine?
Which isotope mass corresponds to the known relative abundance of 25% for chlorine?
What is the electronic arrangement of a sodium atom?
What is the electronic arrangement of a sodium atom?
Which element has the electronic arrangement of 2, 8, 8?
Which element has the electronic arrangement of 2, 8, 8?
What is the definition of the octet rule?
What is the definition of the octet rule?
What characteristic greatly influences the chemical properties of an element?
What characteristic greatly influences the chemical properties of an element?
Which noble gas has an electronic arrangement of 2, 8, 18, 8?
Which noble gas has an electronic arrangement of 2, 8, 18, 8?
What is the atomic number of an atom?
What is the atomic number of an atom?
Which term describes an electron configuration with 2 electrons in the outermost shell?
Which term describes an electron configuration with 2 electrons in the outermost shell?
What is the mass number of an atom if it contains 6 protons and 8 neutrons?
What is the mass number of an atom if it contains 6 protons and 8 neutrons?
Which of the following is a characteristic property of metals?
Which of the following is a characteristic property of metals?
Which of the following best describes a semi-metal?
Which of the following best describes a semi-metal?
What is an exception among metals regarding its state at room temperature?
What is an exception among metals regarding its state at room temperature?
Which of the following describes a property of non-metals?
Which of the following describes a property of non-metals?
Which non-metal is known for being an exception due to its physical properties?
Which non-metal is known for being an exception due to its physical properties?
Which of the following statements about sodium is true?
Which of the following statements about sodium is true?
What is a typical characteristic of non-metals when in solid form?
What is a typical characteristic of non-metals when in solid form?
What defines the physical state of most metals?
What defines the physical state of most metals?
Which of the following is an accurate definition of a compound?
Which of the following is an accurate definition of a compound?
What is the definition of a pure substance?
What is the definition of a pure substance?
Which physical method can be used to separate a mixture of iron and sulfur?
Which physical method can be used to separate a mixture of iron and sulfur?
Which statement best describes a mixture?
Which statement best describes a mixture?
Which of the following is NOT an example of a physical change?
Which of the following is NOT an example of a physical change?
What occurs during the chemical change of mercury oxide?
What occurs during the chemical change of mercury oxide?
Which of the following substances can be categorized as an element?
Which of the following substances can be categorized as an element?
What are two examples of semi-metals?
What are two examples of semi-metals?
How can distillation be classified?
How can distillation be classified?
Which statement correctly describes the conductivity of semi-metals?
Which statement correctly describes the conductivity of semi-metals?
What property do semi-metals generally have?
What property do semi-metals generally have?
Which application utilizes the properties of silicon?
Which application utilizes the properties of silicon?
What is the definition of an atom?
What is the definition of an atom?
What particles are contained within the nucleus of an atom?
What particles are contained within the nucleus of an atom?
Why is an atom considered electrically neutral?
Why is an atom considered electrically neutral?
Which is NOT recognized as a chemical element?
Which is NOT recognized as a chemical element?
