Answer:
The correct answer out of the four given options is
option a. light elements with atomic numbers less than 5
Explanation:
Big Bang nucleosynthesis, abbreviated as BBN, also known as primordial nucleosynthesis took place after the Big Bang for about 10 s to 20 minutes and resulted in the yield of isotopes of helium-4 (
), helium-3 (
) which accounts for most of the world's helium, other isotopes of hydrogen in small amounts like deuterium (D or
) and lithium isotope, lithium-7(
) in small amount.
Apart from these stable nuclei, it also yielded two radio-active isotopes: tritium(
) and beryllium-7(
) which due to their unstability later decayed into () and ().
All of these isotopes are of light elements with atomic number less than 5.
The additional information that will guarantee that the quadrilateral QUAD is a rhombus would be that all the sides have equal length, and that the opposite angles are the same.
The rhombus is a simple quadrilateral in which all of the four sides have the exact same length. In this case, since the sides UA and DA are 4 inches each, the sides QU and QD will also have the same length.
Also, the opposite sides are parallel, so we will have two sets of parallel sides with the same length.
The opposite angles in the rhombus are the same, so we would have two sets of opposite angles with the same values.
Answer:
The E.U was formed November 1st 1993
