A/an gas is an imaginary gas whose particles are infinitely small and do not interact with each other.

The PIPES Act requires the PHMSA to set minimum safety standards for underground natural gas storage facilities and review and update current pipeline safety standards for liquefied natural gas LNG. Additionally certain underwater oil pipelines now have greater inspection requirements. On October 3 the PHMSA issued an interim final rule allowing the agency to declare emergency orders on oil and natural gas pipelines especially in cases where public health and safety are a concern according to a report from Natural Gas Intelligence.   i hope this is what you were looking for if not im sorry

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

they are made of gases.

they have a spherical shape.

they make energy through fusion.