University:
High School
Course:
High School Chemistry
Academic year:

2021
Views:

437

Pages:

4
Author:

Karly Davis

Representative E!ements iп Periods 1 questions. Complete the following / 1. In а period does the electronegativity increase, decrease or remain the. same? Explain the trend 2. In а group does the electronegativity increase, decrease or remain the same? Explain the trend 3. In а period does the ionization energy increase, decrease or remain the same? Explain the trend 4. In а group does the ionization energy increase, decrease or remain the same? , , Ехр lain the trend� J 5. In а period does the atomic radius increase, decrease or remain the same? Explain the trend - " � 6. In а group does the atomic radius increase, decrease or remain the same? Explain the trend 1 Which element in Period 4 forms а 2+ ion Ьу losing electrons from the two outermost principal energy levels? А) Са В) Кr 10) к Cu А) number of protons increases, and the number of shells of electrons remains the same В) number of protons increases, and the number of shells of electrons increases С) number of protons decreases, and the number of shells of electrons increases D) number of protons decreases, and the number of shells of electrons remains the same From which of these atoms in the ground state сап а valence electron Ье removed using the least amount of energy? .'-' carbon С) chlorine nitrogen D) oxygen 3) IfX represents an element of Group 1, the formula of its oxide would Ье 1) @2 С) 17 D) 18 @ 12 ) А) remains the same �1, increases {CV decreases \.��'' 7) а transition metal В) an alkaline earth С) an alkali metal D) а halogen С) Mg D) К As the elements in Group 17 are considered in order of increasing atomic number, the chemical reactivity of each successive element IfM represents an atom of an alkali metal, the correct formula for а compound of this atom with chlorine is MCI An aqueous solution ofXCl2 contains colored ions. ElementX is most likely ф Which element can react with fluorine to form more tha.n one Ьinary COJ:1?-po111:1d? А) Na <:!_щ_n Periodic ТаЫе, the elements are aпanged according to Compared to atoms of metals, atoms of nonmetals generally have А) atomic mass В) mass number ((f)) atomic number D) oxidation number The oxide of metalX has the formulaX О. What group in the Periodic ТаЫе contains metalX? �·, А) Group 17 Group 2 \'Ф\ С) Group 13 D) Group 1 А) lower electronegativities and higher ionization energies В) higher electronegativities and higher ionization energies С) higher electronegativities and lower ionization energies D) lower ele�tronegativities and lower ionization energies _34) Which group contains elements with а total of two electrons in the outermost principal energy level? А) 16 В) 14 2 D) 18 The data tаЬ!е below shows elementsXх, Уу, and Zz from the same group on the Periodic ТаЬ!е. Atomic Mass Atomic Radius Хх 69.7 141 Уу 114.8 ? Zz 204.4 171 Element (atomic mass unit) (pm) What is the most likely atomic radius of element Уу? А) 185 рт В) 103 рт In what classification is an element placed if its ground state electron configuration is 2-8-13-2? А) metalloids (semimetals) В) nonmetals transition metals D) alkaline earth metals 166 рт D) 127 pm