Podcast
Questions and Answers
Which statement correctly describes how Mendeleev organized the Periodic Table?
Which statement correctly describes how Mendeleev organized the Periodic Table?
- He classified elements according to their densities.
- He arranged elements by increasing atomic number.
- He grouped elements by their similar physical and chemical properties. (correct)
- He placed elements based on their electron configurations.
What is the periodicity trend for electronegativity as you move from left to right across a period?
What is the periodicity trend for electronegativity as you move from left to right across a period?
- Electronegativity fluctuates without a clear trend.
- Electronegativity increases. (correct)
- Electronegativity decreases.
- Electronegativity remains constant.
Which of the following accurately describes the characteristics of nonmetals?
Which of the following accurately describes the characteristics of nonmetals?
- They are good conductors of electricity.
- They are generally brittle in their solid state. (correct)
- They tend to lose electrons during reactions.
- They typically form positive ions.
When forming a neutral ionic compound, what must be true about the oxidation numbers of the elements involved?
When forming a neutral ionic compound, what must be true about the oxidation numbers of the elements involved?
Which of the following is a property of covalent compounds?
Which of the following is a property of covalent compounds?
Flashcards
Mendeleev's Periodic Table
Mendeleev's Periodic Table
Organized elements by increasing atomic mass and grouped them based on similar chemical properties. This led to the discovery of missing elements and gaps in the table, which were later filled as new elements were discovered.
Periodicity
Periodicity
The recurring pattern of chemical and physical properties of elements when arranged in order of increasing atomic number.
Metals
Metals
Elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity. They tend to lose electrons to form positive ions (cations).
Nonmetals
Nonmetals
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Metalloids
Metalloids
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Study Notes
Chapter 4
- Recall how Mendeleev developed the periodic table.
- Define periodicity and identify patterns in graphs of elemental properties.
- Differentiate between metals, nonmetals, and metalloids.
- Recall common names for periodic table groups/blocks.
- Write electron configurations for elements.
- Metals achieve stability by losing electrons (octet rule).
- Nonmetals achieve stability by gaining electrons (octet rule).
- Recall periodic trends (atomic radius, ionic radius, reactivity, electronegativity, ionization energy).
- Explain those trends.
- Explain three influences on periodicity from the catechism.
- Identify valence electrons.
- Draw Lewis dot diagrams for elements and compounds.
- Recall how to determine the mass of calcium.
Chapter 5
- Identify properties of covalent compounds.
- Identify properties of ionic compounds.
- Identify oxidation numbers.
- Create balanced neutral ionic compounds.
- Name ionic compounds, including Roman numerals for transition metals.
Things from Prior Chapters
- Conversions between mass, moles, and molecules.
- Density calculations.
- Electron configurations.
- Unit conversions.
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Description
This quiz covers essential concepts from Chemistry Chapters 4 and 5, focusing on the periodic table's development, periodicity, and the properties of covalent and ionic compounds. Test your understanding of electron configurations, oxidation numbers, and trends in elemental properties.
