Periodic Trends Which statement best describes Group 2 On the Periodic Table, all the elements elements as they are considered in order within Group 16 have the same number of from top to bottom of the Periodic Table? protons The number of principal energy levels neutrons increases, and the number of valence valence electrons electrons increases. energy levels The number of principal energy levels increases, and the number of valence An element with a partially filled d sublevel electrons remains the same. in the ground state is classified as The number of principal energy levels a halogen remains the same, and the number of a transition metal valence electrons increases. an alkali metal The number of principal energy levels an alkaline earth metal remains the same, and the number of valence electrons decreases. Which electron configuration represents a transition element? What is the total number of valence 1s22s22p5 electrons in an atom of boron in the ground [Ar]3d54s2 state? [Nel3s2 1 [Ar]3d104s24p6 3 7 Which element in Period 5 is a transition 5 element? Sr What is the total number of valence Ag electrons in an atom of xenon, Xe? Sb 0 Xe 8 2 Which of the following atoms has the 18 largest atomic radius? Na The elements calcium and strontium have Mg similar chemical properties because they K both have the same Ca atomic number mass number Which noble gas has the highest first number of valence electrons ionization energy? number of completely filled sublevels radon neon krypton helium
Periodic Trends Which statement best describes Group 2 elements as they are considered in order from top to bottom of the Periodic Table? The number of principal energy levels increases, and the number of valence electrons increases. The number of principal energy levels increases, and the number of valence electrons remains the same. The number of principal energy levels remains the same, and the number of valence electrons increases. The number of principal energy levels remains the same, and the number of valence electrons decreases. What is the total number of valence electrons in an atom of boron in the ground state? 1 3 7 5 What is the total number of valence electrons in an atom of xenon, Xe? 0 8 2 18 The elements calcium and strontium have similar chemical properties because they both have the same atomic number mass number number of valence electrons number of completely filled sublevels On the Periodic Table, all the elements within Group 16 have the same number of protons neutrons valence electrons energy levels An element with a partially filled d sublevel in the ground state is classified as a halogen a transition metal an alkali metal an alkaline earth metal Which electron configuration represents a transition element? 1s22s22p5 [Ar]3d54s2 [Nel3s2 [Ar]3d104s24p6 Which element in Period 5 is a transition element? Sr Ag Sb Xe Which of the following atoms has the largest atomic radius? Na Mg K Ca Which noble gas has the highest first ionization energy? radon neon krypton helium
13_periodic_trends_ws.docx