homework #1

Question 1

In a certain type of nuclear reactor uranium -238
( atomic # 92) can be converted into plutononium -239 ( atomic number 94) that can be used to power nuclear reactions. What are the differencex in the structure of the nucleus of these two atoms?

Answer 1

The differences in the structures of the nucleus was determine by writing out Uranium-238 and Plutonium -239 on 2 separate sides. You then find the protons which is 92 due to Uraniums atomic number.electrons are the same as protons. I found neutrons by dividing the atomic number by the mass given which is -238. Which gives us 146 neutrons.WE then repeat the same process by finding the protons for plutonium which is the atomic number. Electrons are the same as protons. I found enutrons by dividing atomic number by the mass given which gives us -145 neutrons. As we can see the differences between -145 neutrons of plutonnium by -126 neutrons of Uranium is 1

Question 2

describe the chemical bonds involved in the formation of water ( how oxygen and hydrogen atoms connect AND how water sticks to other water molecules. Include how and why these bonds form.

Answer 2

The chemical bonds invovled in the formationof water happen because 2 hydrogen atoms forma. polar covalent bond with one oxyen atom. If we took a look at valence electrons, ocygen has 6 and needs 2 more to be complete. Hydrogen only has one nad needs one more to be complete. Combine them both and it becomes stable. The hydrogen bonding in water is when the H2O molecule forms a hydeogen bond between the S- of the oxygen which then connects to the S+ o the hydrogen and then it repeats. Water molecules stick to other water molecules through theses hydrogen bonds, The bonds form because of the postive hydrogen atoms of a water molecule attract the negative oxygen atoms of other water molecules that are near. I looked into the slides from elcture and the diagram is shown there of the hydrogen bonding in water