8.1 Multiple-Choice and Bimodal Questions 1) There are __________ paired and __________ unpaired electrons in the Lewis symbol for a phosphorus atom. A) 4, 2 B) 2, 4 C) 2, 3 D) 4, 3 E) 0, 3 Answer: C Diff: 1 Page Ref: Sec. 8.1 2) In the Lewis symbol for a fluorine atom, there are __________ paired and __________ unpaired electrons. A) 4, 2 B) 4,1 C) 2, 5 D) 6, 1 E) 0, 5 Answer: D Diff: 1 Page Ref: Sec. 8.1 3) Based on the octet rule, magnesium most likely forms a __________ ion.
Identify the condensed formula of the following structure: A) (CH3)2CHCHClCH(CH3)2 B) CH3CH(CH3)CHClCH(CH3)2 Ans: C C) D) (CH3)2CHCHClC(CH3)3 (CH3)3CCHClCH(CH3)3 9. What is the chemical formula of the following carbon skeleton diagram? A) C8H14 Ans: C B) C8H16 C) C8H18 D) C8H20 10. How many hydrogen atoms are there on carbon atoms 1 and 2, respectively, in the structure below? A) 4, 1 B) 4, 0 Ans: D C) 3, 1 D) 3, 0 11.
2.Which combinations of elements in the periodic table are most likely to form covalent bonds/covalent compounds. Answer: Non-metals are most likely to form covalent bonds with other non-metals. 3.Explain how electronegativity values can be used to determine whether atoms in a bond pair are non-polar or polar. Answer: Electronegativity values can be determined whether the atoms are non-polar and polar by determining the difference (subtracting) of electronegativity between the elements. When the electronegativity difference is 0.0 - 0.4 the electrons are considered to share equally in a non-polar covalent bond.
In the following text you will see my reflection on what I have learned so far on the formation of the Hydrogen atom. A figure on each page is shown of different Hydrogen levels. A hydrogen atom is a single positively charged proton with an orbiting negatively charged electron. Each Hydrogen level is dependent on three quantum numbers. The first quantum number is the principle quantum number which takes the states of n = 1, 2, 3, 4, ... .
The number of protons an atom has is its atomic number. The atomic number plus the number of neutrons the atom has is the atom’s atomic weight. Carbon is the element responsible for life on earth. Carbon creates the backbone of amino acids, which are what make up proteins. The suffix –ine is used for amino acids, and the suffix –yl is used for the protein’s structure.
Particles Chemical purity and stochiometry of the sample were examined using EDS. EDS conform that the developed particles has atomic percentage of 40.76 of Zinc and 59.24 of Oxygen. The elemental constitution of ZnO nanoparticles was also investigated. Two major peaks were found to have weight percentage of 73.77 of Zinc and 26.23 of Oxygen.  X-ray Diffraction (XRD) The crystal structure of the samples was investigated by analyzing the XRD data.
A) gas B) solid C) salts D) ice E) liquid 3. A small amount of salt dissolved in water is an example of a __________. A) compound B) solid C) heterogeneous mixture D) pure substance E) homogeneous mixture 4. Which of the following is an illustration of the law of constant composition? A) Water is 11% hydrogen and 89% oxygen by mass.
The first possible property of electrons and protons that led to their discovery was their “positive rays,” positively charged streams of atoms generated in gas discharge tubes from J.J. Thomson’s experiment. When these positive rays were bent of deflected in the presence of electric and magnetic fields and then allowed to strike a film, they left curved spots. B. Si-28 Protons- 14 Electrons- 14 Neutrons- 14 Si-29- Protons- 14 Electrons- 14 Neutrons- 15 Si-30 Protons- 14 Electrons- 14 Neutrons- 16 C. This is false, because the atomic mass of chlorine is the average mass of the all isotopes. IV. We sorted the beans into three isotope groups (1,2, and 3) according to the type of bean.