Page 133 - Chemistry eBook

electron m
1 1
e e
o e
u u
configuration
represents a
36 What is the oxidation number of iodine in KIO4?
atom in an excited state?
8-6 (3) 2-8-18-6
8-7 (4) 2-8-18-7
he hydronium ion concentration of n is increased by a factor of 10, the pH the solution
eases 1 pH unit eases10pHunits
ases 1 pH unit ases 10 pH units
rmula XF2, the element represented by classified as a
(1) 􏰁1 (3) 􏰁7 (2) 􏰀1 (4) 􏰀7
37 Whatisthechemicalformulaforzinccarbonate?
(1) ZnCO (3) Zn CO 323
p 1 metal p 2 metal
(3) Group 1 nonmetal (4) Group 2 nonmetal
38 Which statement explains why a molecule of
CH isnonpolar? 4
(1) The bonds between the atoms in a CH4 molecule are polar.
(2) The bonds between the atoms in a CH4 molecule are ionic.
(3) The geometric shape of a CH4 molecule distributes the charges symmetrically. (4) The geometric shape of a CH4 molecule
distributes the charges asymmetrically.
39 Which atom in the ground state has the same
compound has the smallest percent tion by mass of chlorine?
(3) LiCl (4) NaCl
he incomplete equation representing n:
􏰁______O →12CO 􏰁14H O 14 2 2 2
Jan 2013 #38
Sample Regents Questions
(2) Zn(CO3)2 (4) Zn3CO2
electron configuration as a calcium ion, Ca2􏰁, in the ground state?
(1) Ar (2) K
(3) Mg (4) Ne
he coefficient of O2 when the equation letely balanced using the smallest
40 In the compound KHASOns,wthere is an ionic bond between the 4
(1) KH􏰁 and SO 2􏰀 ions 4
(2) KHSO 􏰁 and O2􏰀 ions 3
(3) K􏰁 and HS􏰀 ions
mber coefficients?
(3) 19
Choice #3
(4) 26 4 (4) K􏰁 and HSO4􏰀 ions
Explanation: CH is symmetrical. Symmetrical molecules are nonpolar.
[5]
[OVER]
t p u
UNIT 4: BONDING © 133