periodic propertiesThe periodic table is a systematic arrangement of elements based on their atomic number, electron configuration, and chemical properties. It consists of periods (rows) and groups (columns), with elements classified into metals, nonmetals, and metalloids. 1 / 28Last element of periodic tale is Lv Og Ts none 2 / 28Total elememts in halogen family 4 5 6 7 3 / 28Which of following is rocket fuel Li H N Ar 4 / 28Transition series start from which period of periodic table 2 3 4 5 5 / 28Strongest acid in inorganic chemistry Hcl H2SO4 HNO₃ HClO4 6 / 28Total groups in periodic table 8 18 10 7 7 / 28Chalcogen group is O family N family Li family C family 8 / 28Only radioactive lanthanide elements is La Cm Pm Gd 9 / 28Most non metallic element of periodic table is N O F Br 10 / 28Which block in the periodic table contains both metals and nonmetals s p d f 11 / 28Which of the following statements about electron affinity is incorrect Noble gases have near-zero or positive electron affinities Electron affinity measures the tendency of an atom to gain electrons Nonmetals tend to have more negative electron affinities than metals Electron affinity increases down a group due to increasing atomic size 12 / 28Why does nitrogen have a lower (less negative) electron affinity than carbon? Nitrogen has a greater nuclear charge Nitrogen has a half-filled p-orbital, making it more stable Carbon has more electron shielding than nitrogen Carbon is a metal, while nitrogen is a nonmetal 13 / 28Which of the following elements has a positive electron affinity (i.e., it requires energy to add an electron)? F O S Ne 14 / 28Which of following has greatest electron affinity? F Cl Br I 15 / 28Which of the following correctly describes electron affinity The energy required to remove an electron from an atom The energy released when an electron is added to a neutral atom The tendency of an atom to attract a bonded electron pair The ability of an atom to lose an electron easily 16 / 28The second ionization energy of sodium (Na) is extremely high because It involves the removal of an electron from a stable noble gas configuration Sodium has a large atomic radius Sodium has a high nuclear charge The second electron is removed from the same energy level 17 / 28Which of the following elements shows an unexpected increase in first ionization energy compared to its previous element in the same period? Mg Al O N 18 / 28Which element has the highest first ionization energy? He Ne F O 19 / 28Which of following has largest size F O2- F- N3- 20 / 28How does the atomic radius of cations compare to their neutral atoms Larger than neutral atoms Smallerr than neutral atoms Equal to neutral atoms First increases, then decreases 21 / 28Which of the following elements has the largest atomic size Li K Cs Rb 22 / 28Which of the following factors is responsible for the decrease in atomic size across a period? Increase in the number of electron shells Decrease in effective nuclear charge Increase in electron shielding Increase in nuclear charge 23 / 28Atomic size generally __________ across a period from left to right in the periodic table decrease remains constant increases first decrease then increase 24 / 28Which scientist's work led to the discovery of the lanthanide and actinide series Glenn Seaborg Henry Moseley Antoine Lavoisier Rutherford 25 / 28Which element’s discovery led to the modification of Mendeleev’s periodic table Argon Uranium Hydrogen Lead 26 / 28Which scientist modified the periodic table by arranging elements in order of increasing atomic number? Rutherford Schrodinger John Newland Henry Moseley 27 / 28What was the main drawback of Mendeleev’s periodic table? No spaces for undiscovered elements Elements were arranged by atomic number Incorrect placement of some elements based on atomic mass No grouping of similar elements 28 / 28Who is known as the "Father of the Periodic Table" John Newlands Dmitri Mendeleev Henry Moseley Antoine Lavoisier Your score isThe average score is 68% 0% Restart quiz
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