Answer all questions.. ***\"IGNORE FOR THE EXPERIENT PART\"** Bio 101 Spring 201

Question

Answer all questions..

***"IGNORE FOR THE EXPERIENT PART"**

Bio 101 Spring 2017 Homework Week 2 For the experiment -start taking 2 ideas and researching them, going into more depth on them. For the artwork- you can start thinking writing sketching- no more than 10 minutes Please do the Homework from Chapter 2 last week 1. What would you find in the nucleus of an atom? 2. Chat kind of charge do an electron, a neutron and a proton have? (positive) 3. If an atom has two electrons how many protons will i have? 4. What does the atomic number tell you? roon irs nucleus 5. What does the atomic mass tell you? 6. How many electrons does the first, second and third electron shell aka energy level hold? 7. What is a valance electron? 8. What can happen if the valence shell is not full? 9 How many electrons do Carbon, Oxygen, Hydrogen, Nitrogen have in their outer valence shells and how many more do they need to fill their valence shel. Questions at the end of the chapter Chapter 3 Can the hydrogen attach to the hydrogen in water? Why can water striders walk on water? What is specific heat and what does it have to do with water? What are the weak chemical bonds?

Explanation / Answer

1.
Necleus of an atom contains positively charged protons and uncharged neutrons.

2.
Electron = -1
Proton = +1
Neutron = 0

3.
If an atom has two electrons, it can have two protons if it is an uncharged atom.
If it is positively charged ion, it would contain 3 protons.
If it is negatively charged ion, it would contain 1 proton.

4.
Atomic number = Number of protons in the nucleus.
It is characterestic to each atom.

5.
Atomic mass = Number of protons + Number of neutrons in the nucleus.

6.
1 energy level = 1s2 = 2
2 energy level = 2s2 2p6 = 8
1 energy level = 3s2 3p6 3d10 = 18

7.
Valence electron is the elecron present in the outermost energy level.

8.
If valence shell is not full, an atom acquires or loses electrons to attain stable octet state. i.e, it is chemically reactive.

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