All of the alkali metals, group 1, have one valence electron. which of these would represent the oxidation number of the alkali metals such as lithium and sodium? a) -7 b) -1 c) +1 d) +7

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

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