Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form. in scientific notation, the radius of the sun is × 10 kilometers. in expanded notation, each bacterial cell is millimeters wide.

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The radius of the Sun is 6.96 x 10⁵ km

Each bacterial cell is 0.00019 mm wide.

Explanation:-

When scientists often deal with numbers that are either very large or very small, they use the scientific notation.

The number is expressed as a quantity multiplied by 10 raised to a appropriate power.

When there are zeroes to the right, the power of ten is positive. If the zeroes are to the left, it is negative.

Thus 696000 becomes 6.96 x 10⁵ having zeroes to the right.

Again 1.9 x 10⁻⁴ becomes 0.00019 having a negative power.

Thus the radius of the Sun is 6.96 x 10⁵ km

Each bacterial cell is 0.00019 mm wide.

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).