The answer is (3) neutrons and protons. The nucleus of an atom is composed of neutrons and protons. There is only one atom nucleus composed of only protons, Hydrogen. And the electrons are moving in high speed around the nucleus.
Answer:
C.
Explanation:
Stereoisomers are molecules that have the same molecular formula and with their atoms connected in the same way but pointing in different directions.
<em>cis</em>-Pent-2-ene has formula C₅H₁₀
A. is wrong, because its formula is C₅H₁₂
B. and D. are wrong, because their formulas are C₅H₈
The only option left is C. It has formula C₅H₁₀
C. is a stereoisomer of <em>cis</em>-pent-2-ene, because atoms 1 and 4 are on opposite sides of the double bond.
Think of the C=C bond as a river.
In the <em>cis </em>isomer (top), atoms 1 and 4 are on the same side of the river (zis = zame zide).
In the <em>trans</em> isomer (bottom), atoms 1 and 4 are on opposite sides of the river (trans = across or opposite).
So, C. is a stereoisomer of cis-pent-2-ene.
C because seeps into earths to replenish earths groundwater
Soil is made out of all of these things and covers almost all landmasses. Even below sand and rock there is soil.