calcium An atom of of the following elements has the potassium greatest ability to attract electrons? silicon element in Group 15 has the strongest metallic sulfur character? nitrogen Bi chlorine As P At STP, which substance is the best conductor of N electricity? nitrogen Which halogens are gases at STP? neon chlorine and fluorine sulfur chlorine and bromine silver iodine and fluorine iodine and bromine Which metal is obtained commercially by the electrolysis of salt? When combining with nonmetallic atoms, metallic Zn atoms generally will K lose electrons and form negative ions Fe lose electrons and form positive ions Ag gain electrons and from negative ions gain electrons and form positive ions Which element can be found in nature in the free (uncombined) state? Which set of elements contains a metalloid? Ca K, Mn, As, Ar Ba Li, Mg, Ca, Kr Au Ba, Ag, Sn, Xe Al Fr, F, O, Rn Which formula represents a molecular substance? Atoms of elements in a group on the Periodic Table CaO have similar chemical properties. This similarity is CO most closely related to the atoms' Li2O number of principal energy levels Al2O3 number of valence electrons atomic numbers Which sequence of Group 18 elements atomic masses demonstrates a gradual decrease in the strength of the Van der Waals forces? All the choices are As atoms of elements in Group 16 are considered in elements in the liquid state. order from top to bottom, the electronegativity of Ar, Kr, Ne, Xe each successive element Kr, Xe, Ar, Ne decreases Ne, Ar, Kr, Xe increases Xe, Kr, Ar, Ne remains the same Which substance is an example of a network solid? The first ionization energy of an element is 736 kJ nitrogen dioxide per mole of atoms. An atom of this element in the sulfur dioxide ground state has a total of how many valence carbon dioxide electrons? silicon dioxide 1 2 Which combination of atoms can form a polar 3 covalent bond? 4 H and H H and Br
calcium potassium element in Group 15 has the strongest metallic character? Bi As P N Which halogens are gases at STP? chlorine and fluorine chlorine and bromine iodine and fluorine iodine and bromine When combining with nonmetallic atoms, metallic atoms generally will lose electrons and form negative ions lose electrons and form positive ions gain electrons and from negative ions gain electrons and form positive ions Which set of elements contains a metalloid? K, Mn, As, Ar Li, Mg, Ca, Kr Ba, Ag, Sn, Xe Fr, F, O, Rn Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms' number of principal energy levels number of valence electrons atomic numbers atomic masses As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element decreases increases remains the same The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons? 1 2 3 4 An atom of of the following elements has the greatest ability to attract electrons? silicon sulfur nitrogen chlorine At STP, which substance is the best conductor of electricity? nitrogen neon sulfur silver Which metal is obtained commercially by the electrolysis of salt? Zn K Fe Ag Which element can be found in nature in the free (uncombined) state? Ca Ba Au Al Which formula represents a molecular substance? CaO CO Li2O Al2O3 Which sequence of Group 18 elements demonstrates a gradual decrease in the strength of the Van der Waals forces? All the choices are elements in the liquid state. Ar, Kr, Ne, Xe Kr, Xe, Ar, Ne Ne, Ar, Kr, Xe Xe, Kr, Ar, Ne Which substance is an example of a network solid? nitrogen dioxide sulfur dioxide carbon dioxide silicon dioxide Which combination of atoms can form a polar covalent bond? H and H H and Br