Tin, because it has five energy levels with four electrons in the fifth level
.
Explanation:
Tin has an electronic configuration as
1s2,2s2,2p6,3s2,...........4d10, 5s2,5p2
They have four valence electrons in their outer shell
Among the four diagrams given Tin is least reactive because the atomic radius of tin is largest among all four options. Due to large atomic radius electronegativity decreases and hence Tin is the least reactive element among Neon, Chlorine, gallium and tin.
The electronegativity of an element is its tendency to complete its octet by attracting electrons towards itself. Also tin is at the lowest place in the periodic table among all the four mentioned elements, its ionization energy is also low hence less electronegative and least reactive.
The last one
some cells are living and some cells are not
i think
Dish soap- the molecules that make up the soap are more specifically designed to break down grease
Complementary strand of mRNA would be: AAUCGGAAC
In short, Your Answer would be Option C
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Answer:
1. Gas giant
2. Galaxy
3. Universe
Explanation:
I know my space. Hope this helps!