Question 1

A positive ion a) anions b) cations c) element  d) isotope  e) atom

Accepted Answer

b

Question 2

An atom of the same element that differs by the number of neutrons a) anions b) cations c) element  d) isotope  e) atom

Accepted Answer

d

Question 3

Cannot be broken down chemically a) anions b) cations c) element  d) isotope  e) atom

Accepted Answer

e

Question 4

Will migrate through a salt bridge to the anode half cell a) anions b) cations c) element  d) isotope  e) atom

Accepted Answer

a

Question 5

Which of the following combinations represents an element with a net charge of +1 with a mass number of 75? a) 35 (o), 35 (+), 34 (-) b) 40 (o), 40 (+), 39 (-) c) 40 (o), 35 (+), 34 (-) d) 37 (o), 38 (+), 34 (-) e) 40 (o), 35 (+), 35 (-)

Accepted Answer

c

Question 6

The modern periodic table is ordered on the basis of  a) atomic mass b) atomic radius c) atomic charge d) atomic number  e) number of neutrons

Accepted Answer

d

Question 7

What is the mass number of the hydrogen isotope that contains 2 neutrons? a) 1 b) 2 c) 3 d) 4 e) none of the above

Accepted Answer

c

Question 8

An atom that has the same number of neutrons as Barium with an atomic mass of 138 a) Cs; atomic mass of 138 b) Ba; atomic mass of 136 c) La; atomic mass of 137 d) Xe; atomic mass of 136 e) none of the above

Accepted Answer

d

Question 9

The nucleus of an atom consists mainly of a) neutrons and electrons b) protons and electrons c) protons and neutrons d) protons, neutrons, and electrons e) none of the above

Accepted Answer

c

Question 10

How many electrons would be in a -2 charged anion of sulfur? a) 2 b) 16 c) 18 d) 36 e) none of the above

Accepted Answer

c

Question 11

How many protons and electrons are present in OÂ²â»? a) 8 protons and 8 electrons  b) 10 protons and 8 electrons  c) 8 protons and 10 electrons  d) 16 protons and 8 electrons  e) none of the above

Accepted Answer

c

Question 12

Group 2A elements are also called: a) noble gases  b) halogens  c) alkaline earth metals  d) alkali metals  e) none of the above

Accepted Answer

c

Question 13

Neutral charge; 1 amu a) proton b) neutron c) electron d) isotope  e) ion

Accepted Answer

b

Question 14

Positive charge a) proton b) neutron c) electron d) isotope  e) ion

Accepted Answer

a

Question 15

Negligible weight  a) proton b) neutron c) electron d) isotope  e) ion

Accepted Answer

c

Question 16

Mg is a member of which family? a) noble gases  b) halogens c) alkaline earth metals  d) alkali metals e)none of the above

Accepted Answer

c

Question 17

Metalloid a) K b) As c) Be d) Se e) Ir

Accepted Answer

b

Question 18

Nonmetal a) K b) As c) Be d) Se e) Ir

Accepted Answer

d

Question 19

Class IA Metal  a) K b) As c) Be d) Se e) Ir

Accepted Answer

a

Question 20

Xe is a member of which family? a) noble gases b) halogens  c) alkaline earth metals d) alkali metals  e) none of the above

Accepted Answer

a

Question 21

All of the following statements about different elements are true EXCEPT: a) barium is an alkali earth metal b) manganese is a transition metal  c) sulfur is considered a metalloid  d) krypton is one of the noble gasses  e) iodine is a halogen

Accepted Answer

c

Question 22

Ions are formed when atoms  a) gain or lose protons b) gain or lose electrons c) gain or lose neutrons  d) each of these results in ion formation e) none of these results in ion formation

Accepted Answer

b

Question 23

Group 1A elements are also called  a) noble gases b) halogens c) alkaline earth metals d) alkali metals e) none of the above

Accepted Answer

d

Question 24

Nonmetals are located where on the periodic table a) left side b) right side c) middle d) zig-zag diagonal line  e) none of the above

Accepted Answer

b

Question 25

What is the atomic symbol for silver? a) S b) Ag c) Au d) Si e) none of the above

Accepted Answer

b

Question 26

Which of the following statements about the nature of electrical charge is FALSE? a) electrical charge is a fundamental property of protons and electrons b) positive and negative electrical charges attract each other c) positive-positive or negative-negative charges repel each other d) positive and negative charges cancel each other so that a proton and electron, when paired, are neutral  e) all of the above statements are true

Accepted Answer

e

Question 27

Chlorine has two stable isotopes, Cl-35 and Cl-37. If their exact masses are 34.9689 amu and 36.9695 amu, respectively, what is the natural abundance of Cl-35? (The atomic mass of chlorine is 35.45 amu) a) 75.95% b) 24.05% c) 50.00% d) 35.00% e) 37.00%

Accepted Answer

a

Question 28

Which of the following elements has an atomic number of 4? a) H b) C c) He d) Be e) none of the above

Accepted Answer

d

Question 29

The atomic theory was first developed by the Greek philosopher  a) John Dalton b) J. J. Thompson c) Democritus  d) E. Rutherford e) Bohr

Accepted Answer

c

Question 30

He expanded the first atomic theory in the early 1800s with his own theory  1. All matter is composed of indivisible atoms  2. Elements or types of atoms can be classified by mass and properties  3. Atoms combine in fixed, simple, and definitive ratios to form molecules  a) John Dalton b) J. J. Thompson c) Democritus  d) E. Rutherford e) Bohr

Accepted Answer

a

Question 31

He redirected cathode rays with a magnet to create an eery glow; famous for his plumb pudding model, which concluded on the existence of many negatively charges electrons within a positive orb a) John Dalton b) J. J. Thompson c) Democritus  d) E. Rutherford e) Bohr

Accepted Answer

b

Question 32

Shot a radioactive beam at a thin gold sheet and saw that particles were deflected in all directions. He concluded on the existence of a dense nucleus and the existence of the neutron a) John Dalton b) J. J. Thompson c) Democritus  d) E. Rutherford e) Bohr

Accepted Answer

d

Question 33

Through his complex mathematical calculations, he found that electrons in a Hydrogen atom travel in a fixed orbit a) John Dalton b) J. J. Thompson c) Democritus  d) E. Rutherford e) Bohr

Accepted Answer

e

Question 34

The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this in scientific notation a) 1.72 x 10â»â¹m b) 1.72 x 10â»Â¹â°m c) 0/172 x 10â»Â¹â°m d) 17.2 x 10â¹m e) 1.72 x 10Â¹â°m

Accepted Answer

b

Question 35

The correct scientific notation for the number 500.0 is: a) 5 x 10Â² b) 5.00 x 10Â² c) 5.000 x 10Â² d) 5 x 10â»Â² e) none of the above

Accepted Answer

c

Question 36

Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25 and 26 degree Celsius marks. We should properly report the temperature measurement as  a) 25Â°C b) 26Â°C c) 25.5Â°C d) 25.50Â°C e) 25.55Â°C

Accepted Answer

c

Question 37

In the number 48.93, which digit is estimated? a) 4 b) 8 c) 9 d) 3 e) none of the above

Accepted Answer

d

Question 38

The correct number of significant figures in the number 0.027090 is: a) 7 b) 6 c) 5 d) ambiguous e) none of the above

Accepted Answer

c

Question 39

What is the density (g/mL) of a n object that a has a mass of 14.01g and, when placed into a graduated cylinder, causes the water level to rise from 25.2mL to 33.6mL? a) 0.60 b) 1.7 c) 1.8 d) 2.4 e) none of the above

Accepted Answer

b

Question 40

Given the following list of densities, which materials would float in a molten vat of lead provided they do not themselves melt? Densities: lead 11.4, glass 2.6, gold 19.3, charcoal .57, platinum 21.4 a) gold and platinum  b) glass and charcoal c) gold, platinum, glass, and charcoal d) gold and charcoal e) none of the above

Accepted Answer

b

Question 41

Which of the following is NOT an example of matter? a) a pencil eraser b) a ballon full of helium c) a dust particle  d) heat from a burning candle  e) none of the above

Accepted Answer

d

Question 42

Which of the following is a pure substance? a) air b) seawater c) brass d) ice e) none of the above

Accepted Answer

d

Question 43

Which of the following items is a mixture? a) water b) helium c) brass d) sugar e) none of the above

Accepted Answer

c

Question 44

Which of the following is a heterogeneous mixture?  a) milk b) sugar water c) raisin bran d) air e) none of the above

Accepted Answer

c

Question 45

All of the following can be considered physical properties EXCEPT a) taste b) color c) flammability d) density e) boiling point

Accepted Answer

c

Question 46

Which of the following items is a physical property? a) the corrosive action of acid rain on granite b) the odor of spearmint gum c) the combustion of gasoline d) the tarnishing of a copper statue e) none of the above

Accepted Answer

b

Question 47

When methane is burned with oxygen the products are carbon dioxide and water. If you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction? a) 32 b) 80 c) 96 d) 64 e) none of the above

Accepted Answer

d

Question 48

A pair of electrons that is shared between two atoms is  a) a double bond b) an ionic bond c) a lone pair d) a covalent bond e) both a double bond and a covalent bond

Accepted Answer

d

Question 49

How many total valence electrons are present in perchlorate ion, ClOââ» a) 30 b) 31 c) 32 d) 49 e) 50

Accepted Answer

c

Question 50

How many total valence electrons are present in dinitrogen oxide? a) 8 b) 16 c) 22 d) 24 e) none of the above

Accepted Answer

b

Question 51

Use the VSEPR theory to predict the molecular geometry of HâS a) bent b) linear  c) tetrahedral d) triangular planar e) triangular pyramidal

Accepted Answer

a

Question 52

Use the VESPR theory to predict the molecular geometry of NHââº a) triangular pyramidal b) square pyramidal c) see-saw d) tetrahedral e) triangular planar

Accepted Answer

d

Question 53

Which of the following molecules are nonpolar: HâS, Oâ, NHâ, BHâ, and CClâ? a) Oâ, BHâ. CClâ b) HâS, Oâ, and CClâ c) NHâ and BHâ d) Oâ, NHâ, and CClâ e) Oâ

Accepted Answer

a

Question 54

Which of the following molecules have the same molecular geometry: COâ, HâO, BeClâ, and NâO a) COâ and NâO only b) HâO and NâO only c) HâO and BeClâ only d) COâ and BeClâ only e) COâ, BeClâ, and NâO

Accepted Answer

c

Question 55

Use the VSEPR theory to predict the molecular geometry of NHâ a) triangular pyramidal  b) triangular planar c) linear d) tetrahedral  e) triangular bipyramidal

Accepted Answer

a

Question 56

How many possible resonance structures exist for NâOâ? a) 2 b) 3 c) 4 d) 5 e) 6

Accepted Answer

c

Question 57

How many resonance structures exist for carbonate ion? a) 2 b) 3 c) 4 d) 6 e) 8

Accepted Answer

b

Question 58

Use VESPR theory to predict the molecular geometry of SOâÂ²â» a) bent b) triangular planar c) triangular pyramidal d) square planar e) tetrahedral

Accepted Answer

c

Question 59

What are the bond angles in COâÂ²â»? a) 90Â° b) 109.5Â° c) 120Â° d) 90Â° and 120Â° e) 180Â°

Accepted Answer

c

Question 60

Which of the following molecules has a Lewis structure with a molecular geometry similar to COâÂ²â»? a) NHâ b) NHââº c) PClâ d) SOâ e) none of the above

Accepted Answer

d

Question 61

Which of the following molecules has a Lewis dot structure with a molecular geometry similar to COâ? a) HâS b) NOâ c) SCNâ» d) HâO e) NOââ»

Accepted Answer

c

Question 62

Which of the following molecules has a Lewis structure with a molecular geometry similar to SFâ? a) CClâ b) IClââ» c) NHââº d) SOâÂ²â» e) none of the above

Accepted Answer

e

Question 63

Use the VESPR theory to predict the molecular geometry of NOââ» a) bent b) linear c) triangular planar d) t-shaped e) none of the above

Accepted Answer

a

Question 64

Use the VESPR theory to predict the molecular geometry of COâ a) linear b) bent c) triangular planar d) tetrahedral e) triangular pyramidal

Accepted Answer

a

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