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$$$ Quiz $$$ Periodic Table What is the process that creates an ion called? Ionization What is a positive ion called? cation What is a negative ion called? anion As you move down a group, what happens to ionization energy? decreases Which element has the highest ionization energy? Helium Why does atomic radii decrease as you go from left to right across a period? increasing nuclear charge True or false. Ionic radii and atomic radii trend in the same manner. true True or false. Cl- anion is larger than a Cl neutral atom true How many diatomic elements can you name? hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine Which element has the electron configuration 2 2 6 2 6 2 10 3 1s 2s 2p 3s 3p 4s 3d 4p ? Arsenic, As Which element is the most electronegative? fluorine Which element is the least electronegative? francium What is the definition of ionization energy? The energy required to remove one electron from a neutral atom What is the definition of electron affinity? The energy produced when an electron is added to neutral atom Why does ionization energy increase from left to right across a period? increasing nuclear charge A horizontal row in the periodic table period Vertical column in the periodic table group Who arranged the elements according to atomic mass? Mendeleev Elements within a group have a similar number of ________. Valence electrons True or false. Cations form when an atom gains electrons. False Who arranged the elements according to atomic number? Moseley The modern periodic table is arranged by atomic _______. number Who developed the concept of electronegativity? Linus Pauling Poor conductor of electricity … metals or non-metals? non-metals What sublevels are filling across the transition metals? d-orbitals What sublevels are filling across the inner-transition metals? f-orbitals A positive ion is (larger/smaller) than its parent atom? smaller An element with both metallic and nonmetallic properties is called a _________? Metalloid or semimetal Group 17 (7A) elements are known as …. halogens Alkali metals react violently with what substance? water