Podcast
Questions and Answers
How does metallic character change as atomic number increases across a period and down a group?
How does metallic character change as atomic number increases across a period and down a group?
Which elements are most likely to form anions?
Which elements are most likely to form anions?
Which group of elements has the strongest tendency to form anions?
Which group of elements has the strongest tendency to form anions?
What is the expected smallest ion in size?
What is the expected smallest ion in size?
Signup and view all the answers
Which of the following does not represent the correct order of ion sizes?
Which of the following does not represent the correct order of ion sizes?
Signup and view all the answers
What is the correct order of ionic size for Na+, Mg++, Al3+, and Si4+?
What is the correct order of ionic size for Na+, Mg++, Al3+, and Si4+?
Signup and view all the answers
If the atomic number of an element is 33, which group will it be placed in on the periodic table?
If the atomic number of an element is 33, which group will it be placed in on the periodic table?
Signup and view all the answers
Which statement correctly describes the trend of atomic volume in a period from left to right?
Which statement correctly describes the trend of atomic volume in a period from left to right?
Signup and view all the answers
Which electronic configuration exhibits an abnormally high difference between second and third ionization energy?
Which electronic configuration exhibits an abnormally high difference between second and third ionization energy?
Signup and view all the answers
What is one of the characteristic properties of nonmetals?
What is one of the characteristic properties of nonmetals?
Signup and view all the answers
Study Notes
Classification of Elements and Periodic Properties
- Pauling's electronegativity values help predict molecular polarity, EMF series position, coordination numbers, and dipole moments.
- Electronic configurations are used to determine which elements are not in the same family.
- Metallic character decreases across a period and increases down a group in the periodic table.
- Anion formation is most easily seen in the halogen group.
- Elements in the oxygen family have a strong tendency to form anions.
- Protons have a large charge, ionization potential, and hydration energy, but small radius.
- Isoelectronic species (Na+, Mg2+, Al3+, Si4+) have decreasing ionic size as the positive charge increases.
- Element 33 is in group 15.
- Atomic volume decreases across a period from left to right.
- High difference in ionization energies is seen in elements with a specific electronic configurations.
- Nonmetals are typically electronegative reducing agents, forming basic oxides.
- Element with electronic configuration 1s²2s²2p⁶3s²3p³ has atomic number 15.
- Element with atomic number 118 will be a noble gas.
- Smallest ion size is Mg²+.
- Ionic radii are inversely proportional to effective nuclear charge.
- Paramagnetic behaviour is seen in oxides with an odd number of electrons.
- A cation has a smaller ionic radius than its neutral atom. An anion has a larger ionic radius than its neutral atom.
- The first ionization potential of beryllium is greater than that of boron.
- Elements with atomic configurations that include a half-filled or filled electronic sublevel/shell have higher ionization energies.
- The order of first ionization potentials for Be, B, C, N, and O is Be < B < C < N < O.
- The correct order of acidic strength for hydrides of Group 15 elements is NH₃ < PH₃ < AsH₃.
- Silicon has a coordination number of 4 in its compounds.
- Fluorine has a lower bond energy than chlorine.
- Mn(III) is more stable than Mn(II) in aqueous solution.
- Elements in group 15 exhibit oxidation states of +3 and +5.
- Ferrous ions (Fe²⁺) have a higher degree of unpairing than nickel(II) ions (Ni²⁺).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
