Classification of elements and periodicity in properties
37) Which two elements have the same ground-state electron configurati.docx
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37) Which two elements have the same ground-state electron configuration? A) Cl and Ar B) Cu and Ag C) Pd and Pt D) Fe and Cu E) No two elements have the same ground-state electron configuration. 38) The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X? A) chalcogen B) main group element C) alkali metal D) halogen E) transition metal 39) Atomic radius generally decreases as we move A) down a group and from right to left across a period B) down a group and from left to right across a period C) down a group; the period position has no effect D) up a group and from left to right across a period E) up a group and from right to left across a period 40) Of the following, which gives the correct order for atomic radius for Ca, K, As, Ge and Kr? A) Ge> As > Kr> K> Ca B} Ca > K > As > Ge > Kr C) Kr > As > Ge > Ca > K D) K Ca > Ge > As > Kr E) Kr > GeAs> K> Ca 41) Of the choices below, which gives the order for first ionization energies? A) CI> S Al> Si> Ar B) Al > SisCI> Ar C)s > SiC A> Ar D) Ar > Cl> S> Si > Al E)CI> S Al> Ar> Si have the lowest first ionization energies of the groups listed 42) A) Transition clements B) Alkaline earth metals C) Halogens D) Alkali metals E) Noble gases Block 5-Outcome 10-Concept of the mole 43) A sample of CH40 with a mass of 32.0 g containsmolecules of CH40 A) 5.32 x 10-23 B) 1.00 C) 1.88 x 1022 D) 32.0 E) 6.02 x 1023 44) How many atoms of nitrogen are in 10 g of NH4NO3? A)3.5 B)3.0 x 1023 C)2 D)1.5 x 1023 E) 1.8 45) What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving 0.200 mol Fel3 in water and diluting to 725 mL? A) 0.145 and 0.0483 B) 0.828 and 0.276 C) 0.276 and 0.828 D) 0.276 and 0.276 E) 0.145 and 0.435 Solution Answer 37. E) No 2 elements have the same ground state electronic configurations. It is because no 2 elements have the same atomic numbers in the periodic table, and hence cannot have the same ground state electronic configurations. .
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37) Which two elements have the same ground-state electron configurati.docx
- 37) Which two elements have the same ground-state electron configuration? A) Cl and Ar B) Cu and Ag C) Pd and Pt D) Fe and Cu E) No two elements have the same ground-state electron configuration. 38) The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X? A) chalcogen B) main group element C) alkali metal D) halogen E) transition metal 39) Atomic radius generally decreases as we move A) down a group and from right to left across a period B) down a group and from left to right across a period C) down a group; the period position has no effect D) up a group and from left to right across a period E) up a group and from right to left across a period 40) Of the following, which gives the correct order for atomic radius for Ca, K, As, Ge and Kr? A) Ge> As > Kr> K> Ca B} Ca > K > As > Ge > Kr C) Kr > As > Ge > Ca > K D) K Ca > Ge > As > Kr E) Kr > GeAs> K> Ca 41) Of the choices below, which gives the order for first ionization energies? A) CI> S Al> Si> Ar B) Al > SisCI> Ar C)s > SiC A> Ar D) Ar > Cl> S> Si > Al E)CI> S Al> Ar> Si have the lowest first ionization energies of the groups listed 42) A) Transition clements B) Alkaline earth metals C) Halogens D) Alkali metals E) Noble gases Block 5-Outcome 10-Concept of the mole 43) A sample of CH40 with a mass of 32.0 g containsmolecules of CH40 A) 5.32 x 10-23 B) 1.00 C) 1.88 x 1022 D) 32.0 E) 6.02 x 1023 44) How many atoms of nitrogen are in 10 g of NH4NO3? A)3.5 B)3.0 x 1023 C)2 D)1.5 x 1023 E) 1.8 45) What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving 0.200 mol Fel3 in water and diluting to 725 mL? A) 0.145 and 0.0483 B) 0.828 and 0.276 C) 0.276 and 0.828 D) 0.276 and 0.276 E) 0.145 and 0.435 Solution Answer 37. E) No 2 elements have the same ground state electronic configurations. It is because no 2 elements have the same atomic numbers in the periodic table, and hence cannot have the same ground state electronic configurations.