Which pair of elements forms a bond with
the least covalent character? Refer to the
periodic table.
A. K and Cl
B. O and Cl
C. Na and Cl
D. Mg and Cl

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?