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A. Crookes tube
B. ion
C. isotopes
D. fluorine
E. helium
F. energy level
G. neutron
H. Rutherford
I. Mendeleev
J. valence number
K. covalence
L. Bohr
M. proton
N. Moseley
O. atomic number
P. electron

2006-10-30 05:11:47 · 1 answers · asked by tom y 1 in Science & Mathematics Physics

1 answers

Hi. You can start here : http://www.answers.com/main/ntquery?s=covalence&gwp=16

2006-10-30 05:14:22 · answer #1 · answered by Cirric 7 · 0 0

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