Classification of Elements and Periodicity Questions and Answers

Listen Determine the formal charge of the oxygen atom shown in red 0 CH3 S CH3

CH CI CH OH A A A KOHA B C CI OH OH OH B KCI C H O B KCIO3 C H O B KCIO C H O

Which one of the following factors decreases one s risk of developing osteoporosis short stature None of these options is correct lifting weights pumping iron and exercise early menopause drinking coffee old age Question 31 1 point In terms of credit for the discovery of the structure of DNA pick the correct answer Oswald Avery was the third Nobel winner along with Watson and Crick It has been made clear by careful research that Rosalind Franklin was not given the prize because she was a woman Linus Pauling was included with Watson and Crick in the Nobel Prize None of these statements is correct Rosalind Franklin s X ray work was key in the discovery but she did not share in the Nobel Prize

Consider the structure of the amino acid alanine Indicate the hybridization about each interior atom Drag the labels to the appropriate targets View Available Hint s 4 Reset

62 03 g mol O42 03 g mol 60 03 g mol 39 03 g mol

Arrange the elements in order of increasing electronegativity O S

Which has the highest molecular mass OIBr2 O Br 08 OCBr4 O Br 0

What does the following equation represent Ca5 PO4 3OH 5 Ca 3 PO4 OH the production of calcium ions in milk the production of phosphate in soft drinks the formation of base OH in cheese production coral formation the loss of bone material None of these options is correct

following aspects of fructose activity in the body is correct Since fructose is a sugar it is metabolized in the same way as is glucose Fructose is processed by the liver to make carbon monoxide and water None of these options is correct Fructose is processed by the liver to make fat Fructose is not involved with the promotion of Advanced Glycation End products Fructose can not be digested by humans because they lack the enzyme to brea it down Question 37 1 point Meaghan and Sophie are considering eating a diet that is 10 fat by weight What percentage of their total calories would be fat 31 None of these options is correct 75 25

Hydrogen exists as three isotopes These isotopes differ by the number of the atom Ocharges Oneutrons electrons O protons O particles contained in

A compound has the empirical formula CH and a formula mass of 78 1 amu What is the molecular formula of the compound

A substance absorbs 2 96 104 J of heat and raises the temperature of the system by 312 C What is the mass of the substance if the specific heat capacity is 0 262 J g C 32 8 g 58 7 mg 2 85 mg 362 g

Which statement below regarding bonding is FALSE A single type of atom cannot form more than one kind of chemical bond The energy of separated atoms usually decreases when stable chemical compounds form Most compounds are more stable than the free elements that make them up The strength of a bond depends on the identities of the atoms involved Some atoms form different numbers of chemical bonds exhibit more than one valency

How many moles of C6Hg contain 2 25 x 1024 hydrogen atoms O1 52 moles C6Hg 0 487 moles C6Hg 2 43 moles C6H8 3 74 moles C6Hg 0 223 moles C6H8

Which compound is likely to have an incomplete octet uma BH3 N 0 NF3 CF2C12

What does MO theory explain that other bonding theories do not bonding patterns of atoms and magnetic molecular shape and polarity bonding capacity of atoms and shape molecular magnetic and spectroscopic properties bond angles and bond distance

MISSED THIS Watch IWE 4 10 Read Section 4 9 You can click on the Review link to access the section in your e Text How many molecules are in each of the following 324 g CBr4 Express your answer in molecules to three significant figures VA O xa Xb x vx f X x IXI X 10n

concerning fermentation is correct Pickling is a specific term for fermentation of cucumbers Fermented foods have no effect on immunity Fermented foods reduce the concentration of good bacteria in the gut None of these statements is correct Kimchi s high salt content prevents it from acting as a probiotic A number of short chain fatty acids can be produced Question 44 1 point Which one of the following vitamins is fat soluble Vitamin D None of these options is correct O Vitamin C O Vitamin B3 Vitamin B12

How much energy in J is contained in 1 00 mole of 552 nm photons Chapter 2 3 60 10 28 J 2 17 x 105 J 3 60 10 19 J 5 98 10 43 J Correct E 3 59857x10 19 hc 1 6 626 10 J 6 x 2 9979 10 552x10 m 7 J 6 022 x10 photons 2 17 10 J 3 59857x10 J photon

Which electron is most shielded from nuclear charge O an electron in a 4p orbital an electron in a 3p orbital O a an electron in a 2p orbital an electron in the 1s orbital

Calculate the wavelength of light emitted when an electron in the hydrogen atom makes a transition from an orbital with n 5 to an orbital with n 3 Chapter 2 1 55 x 10 19 m 2 28 10 6 m 6 04 x 10 7 m 1 28 x 10 6 m

Paper clips are made of iron If the average paper clip weighs 2 grams how a mole of iron weigh How many paper clips would be needed for a mole of iron

How much energy is required to ionize a hydrogen atom containing an electron in the n 2 level Express your answer in joules to three significant figures xa AEO x vx x IXI PIZZZA X 10n X

The strategy I am using is Set a clock for every 30 minutes of me doing chores Date May 1 H Date May 2 Date May 3 Date May 4 Date Ma

What is the isotope symbol for atoms that contain the following numbers of subatomic particle Click in the answer box to open the symbol palette a 1 proton 1 electron and 2 neutrons b 4 protons 4 electrons and 5 neutrons c 15 protons 15 electrons and 16 neutrons

Determine the number of protons electrons and neutrons present in the following ions 37 CI protons electrons 40 Ca neutrons protons electrons neutrons

Write the symbol for the ion that is formed after each of the following changes Identify each ion cation or an anion a An oxygen atom gains two electrons The ion is select 8 The symbol is b A mercury atom loses two electrons The ion is select 8 The symbol is

Be sure to answer all parts How many protons neutrons and electrons are in each of the followin a an oxygen atom with a mass number of 15 b a silver atom with a mass number of 109 c a chlorine atom with a mass number of 35 a b Protons Neutrons Electrons

Allange the Following Substances In order of Increasing boiling Point a CH3OH b CO C CH4 CH3 2 Lowest bp CO CH3OH higest bp What is the conjugate base of the following acids 1 H PO4 HPO4

The call letters for all radio stations in the United States start with either a W east of the Mississippi River or a K west of the Mississippi River followed by three other letters that can be repeated How many different call letters are possible

a b a b 7 Which graph would benefit the most from a catalyst Left graph Both graphs JC Left graph Both graphs Right graph d Neither 8 If a catalyst was added to both graphs which graph would experience a decrease in activation energy c Right graph d Neither Potential Energy Activation energy Reactants energy released Reaction Progress Products Potential Energy Activation energy Reactants Products energy absorbed Reaction Progress

XeFn mH O A Contain Xe Other Products Regarding above reaction which of the following option is correct O When n 6 and m 2 the hybridisation of Xe in A is sp d When n 2 and m 1 then other products has a diatomic colored gas When n 6 and m 3 then Electron pair structure of A is tetrahedral When n 6 and m 1 the hybridisation of Xe in A is sp d

2 74in 3 67in 13 9in 0 498in Question 2 If a person on a motorcycle is traveling at 4 5km hour how what is their speed in m min 270 000 m min 57 m min 75 m min 10 p

Read the Instructions for Drawing Lewis Structures worksheet carefully and complete Lewis structures for each of the following molecules Group A Simple Molecules CH Group B Polyatomic Ions PO Group C Multiple Bonds NH CIO H O CIO SiF4 SO NCH

True or False Increasing the temperature of a reaction speeds up the rate of the reaction by providing more kinetic energy in which the molecules can overcome the activation energy barrier O True O False

When comparing the strength of two weak acids what factor can we use to quantify which is the stronger of the two the number of protons the acids can lose O all of the choices are correct O the formula weights of the acids the values of the pka s of the acids none of the choices are correct

When a secondary amine reacts with a carboxylic acid the major product is a an Osalt O alcohol O ester O amide O amine

a Draw a Fischer projection of an aldopentose and its mirror image b Label the pair of aldopentose enantiomers as L and D c What is the maximum number of stereoisomers of an aldopentose that can exist d are either or both of the aldopentoses you drew reducing or non reducing sugars Briefly explain

Which of the following occurs when hydrogen chloride gas is dissolved in water to form hydrochloric acid O H is transferred from water to HCI O H is transferred from HCI to water There is no reaction HCI molecules remain present O a complex between HCI and water is formed

In the tetrapeptide Ala Cys Val Leu the C terminal amino acid is O Phe O Val O Ala O Cys Leu

When an amine behaves as a base it ion O loses hydronium O loses hydroxide O gains hydronium O gains ammonium loses ammonium a hydrogen ion to form a an

Explain what a codon is and its role in peptide synthesis

List ALL the nucleic acid s involved in protein synthesis

4 0 g mol c 108 1 g mol d 164 9 g mol mass of calcium nitrate Ca NO3 2 17 What is the charge on the following ionic bond Beryllium to Chlorine b 1 1 b 2 12 c 1 1 d 2 12 18 The following Lewis Dot Structure would represent what element Potassium b Thallium c Arsenic d Selenium b x 19 The concept of the mole can be used to convert between mass and number of a particles b ounces c grams d inches 20 This substance has excess hydroxide ions OH and an example is tomato sauce a acid b base c neutral d none of these 21 This pH reading has an equal number of hydrogen H and hydroxyl OH ions a acid c neutral d none of these b base 22 All of the following are properties of an acid except a reacts with metals b feels slippery c tastes sour 23 The following are products of neutralization a base and water b acid and base 24 A base has the following pH range a 0 6 b 7 c 8 14 d 15 25 25 A neutral solution has the following pH a 5 b 6 c 7 d 8 26 27 28 29 30 For the following problems match the correct number of significant figures to the corre You will not use all of the below answers and some may be used more than once a 0 SF b 1 SF c 2 SF d 3 SF e 4 SF f 5 SF g 6 SF h 7 SF i 8 SF j 9 SF 0 042 grams 0 0030460 liters 30000 grams d can be corrosive 102 450 000 grams 0 0004035 liters c salt and water d acid and water 31 What is the atomic number for the following electron configuration 1s 2 2s 2 2p 4 b 6 a 5 c 7 d 8 32 What atom matches this electron configuration 1s 2 2s 2 2p 6 3s 3 a Silicon b Aluminum c Carbon d Chlorine 33 The order of fill for an electron configuration is based on the order of energy and the lo This is known as the a Apu Principle b Krabappel Principle c Aufbau Principle 34 In the following electron configuration 1s 2 2s 2 2p 2 what is the number of valence d 8 c 6 b 4 d Flanders Pr

1 A sample of nitrogen occupies a volume of 250ml at 25 degrees Celsius What volume will It occupy at 95 degrees Celsius Which law would you use to solve this problem Boyle s Law b Charles Law c Gay Lussacs Law d B and C a 2 A gas has a pressure of 0 370 atm at 50 0 C What is the pressure at standard temperature b Boyle s Law b Charles Law c Gay Lussacs Law d B and C 3 Calculate the decrease in temperature when 6 00 L at 20 0 C is compressed to 4 00 L a 195 3 Kelvin b 195 6 Kelvin c 195 8 Kelvin d 194 3 Kelvin 4 A 40 0 L tank of ammonia has a pressure of 12 7 kPa Calculate the volume of the ammonia if its changed to 8 4 kPa while its temperature remains constant a 62 0 liters b 63 0 liters c 60 5 liters d 62 5 liters 5 A sample of Oxygen gas occupies a volume of 250 ml at 740 torr pressure What volume will it c pressure Which law would you use to solve this problem C Boyle s Law b Charles Law c Gay Lussacs Law d B and C 6 How many neutrons does Radon have a 222 b 86 c 136 7 How many electrons does Radon have a 222 b 86 C 136 8 How many protons does Radon have a 222 b 86 c 136 d 308 d 308 9 How many energy levels does Radon have a 2 b 4 c 6 d 8 d 308 10 The vertical direction up and down on a periodic table is referred to as a periods b columns c lines d towers 13 The most stable group of elements is the a halogens 11 The horizontal direction side to side on a periodic table is referred to as a periods b columns c lines d towers 12 Which of the following elements can be found in group 2 period 7 c Radium a Radon b Francium d Krypton b metalloids c alkaline earth metals d noble gasses 14 The mass in grams of one mole of a substance is best defined as the Percent of mole b Molar mass c molar balance d None of these a 15 Which answer best defines the molar mass of sodium carbonate Na2CO3 a 108 2 g mole b 106 0 g mole c 160 0 g mole d 106 3 g mol

16 Which answer best defines the molar mass of columne CO 108 1 geld 1640 g 1082 b 1040 g 17 What is the charge on the following ionic bond Berytus to Chine ax 10 1 b 2 12 1 1 4 2 0 26 27 28 29 30 18 The following Lewis Dot Dructure would represent what el Potasshum b Thallume Arsenic d Selenium a 19 The concept of the mole can be used to convert between mass and number of a particles bounces d inches e grams 20 This substance has excess hydroxide ions OH and an example is tomato sauce a acid b base e neutral d none of these 21 This pH reading has an equal number of hydrogen 4 and hydroxyl OH ions a ackd b base e neutral d none of these 22 All of the following are properties of an acid except reacts with metals b feels slippery e tastes sour d can be corrosive 23 The following are products of neutralization a base and water b acid and base c salt and water d acid and water 24 A base has the following pH range a 25 A neutral solution has the following pH a 5 b 6 c7 d e 06 b 7 c 8 14 d 15 25 For the following problems match the correct number of significant figures to the correct digit s You will not use all of the below answers and some may be used more than once 0SF b 1 SF c 2 SF d 3 SF e 4 SF 1 5 SF g 6 SF h 7 SF 1 8 SF J 9 SF 0 042 grams 0 0030460 liters 30000 grams 102 450 000 grams 0 0004035 liters 31 What is the atomic number for the following electron configuration 1s 2 2s 2 2p 4 b 6 a 5 c 7 d 8 32 What atom matches this electron configuration 1s 2 2s 2 2p 6 36 37 Silicon b Aluminum d Chlorine a c Carbon 33 The order of fill for an electron configuration is based on the order of energy and the lowest energy level fills fir This is known as the a Apu Principle b Krabappel Principle c Aufbau Principle d Flanders Principle 34 In the following electron configuration 1s 2 2s 2 2p 2 what is the number of valence electrons of this atom

5 1 000 g of a transition metal carbonate MCO3 is heated to produce the metal oxide and 0 383 g of carbon dioxide M 44 01 What is the identity of the metal M A Mn B Ni C Cu D Zn

Groups 13 14 15 16 17 Properties Phys Cal Chemical Metalloids Use odic Table The Periodic Table Nonmetals Groups 15 Properties Use Property Use Groups 14 16 Group Property Use Halogens Noble Gases Group Property Uses 49

Which molecule has the highest boiling point O CO O C3H8 O C H6 O CH4

Adding ions to water will increase the boiling point of the water O True O False