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scientists around the world have been working for decades on perfecting the process of nuclear fusion in the lab. which statement justifies this research?

a. scientists are looking for a way to generate an unlimited source of hydrogen.
b. scientists are looking for a way to absorb the energy produced by nuclear bombs.
c. scientists are looking for a way to produce the uncommon noble gas helium.
d. scientists are looking for a way to create cheap, safe, and sustainable energy.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.