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I need help with my chemistry assignment

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11 the ionization energies (Kl/mol) of hydrogen, nitrogen, sodium and oxygen are 1,3,1,2  1,4,402,1,681,and 1,314, respectively. Which element combination is LEAST likely
NO3-
NH4+
OH-
NaO-
12 which of the following is a bond in which a metal transfers one or more electrons to a nonmetal
covalent bond
metallic bond
hydrogen bond
ionic bond
13 which of the following statements BEST expalins why a salt soulution conducts electricity
the salt crystals remain intact and form bridges by which electric charges move
the ions move freely in water and carry electric charges 
the ions move freely in water but lose their charges
the salt cyrstals dissolve and form bridges by which electric charges move
14 which of the following is the CORRECT name for a compound with two copper atoms and one oxygen atom
copper (2) oxide
copper (1) oxide
copper(ll)oxide
copper (l)oxide
15 in a piece of silver where would you find the valence electrons
attracted to a cation
shared between a caiton and anion
moving freely between the cations
attached to an anion
16 which of the following BEST describes bronze
a mineral one containing copper and tin
a copper-tin alloy
an ionic compound of copper and tin
a pure metal
17 in which of the following substances does sharing of electrons between two atoms occur
Nal
He
PO4^3-
Ag
18 electrostatic forces hold which of the following together
K+ and Br- in KBr
oxygen and hydrogenatoms in OH-
Cu atoms and localized electrons in copper
He atoms in helium gas
19 a salt forms in the reaction of aluminum with chlorine what is the most likely formula unit of this salt
AlCl3
AlCl2
AlCl
Al3Cl
20 which of the following would have a electrostaic force of attraction between them
Cs+ and Li+
Na+ and Ar
Cl- and O^2-
Fr+ and p^3-