What is the result of (6.2 × 10 4) x (3.3 × 10 2) expressed in scientific notation?

In scientific notation there are some rules;
1) the decimal point is comes to the first non-zero degit.
2) if the decimal point comes from left to right the power of ten must be         negative.
3) if the decimal point comes from right to left then the power of 10 is possitive.
            the numberyou wrote is an scientific form.you must say that expressed in standard form.write brother.

The answer should be a.

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).