Extra problems
16. Strictly using your memory and the mnemonics you have learned, fill in the missing elements in the periodic table below. Practice until you can easily do this.
H
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
Rb
Sr
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
Xe
Cs
Ba
Lu
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
At
Rn
Fr
Ra
17. Click the arrow direction pointing to the atom with the greater share of negative electrons for each bond.
O=C
C≡N
F–C
Br–C
O–C
C–Cl
18. Click the member of each pair that has the more stable anion.
- a)
- b)
- c)
- d)
19. Click the larger anion in each pair.
- a)
- b)
- c)
- d)