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- 1. Multiple ChoiceAn atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?364884
- 2. Multiple ChoiceHow many protons, neutrons, and electrons are present in an atom of Cadmium, Cd, with a mass of 112 amu?48 protons, 112 neutrons, 64 electrons48 protons, 160 neutrons, 48 electrons48 protons, 64 neutrons, 48 electrons
- 3. Multiple ChoiceAn atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?364884
- 4. Multiple ChoiceWhat type of particles are found in the cloud surrounding the nucleus?Positively charged particles and negatively charged particles.Negatively charged particles only.Neutral particles and positively charged particles.
- 5. Multiple ChoiceWhat is the mass number of potassium (K) atom that has 20 neutrons?182039
- 6. Multiple ChoiceAn atom has 25 protons, 30 neutrons, and 25 electons. What is the charge of the atom's nucleus?+25+30-25
- 7. Multiple ChoiceThe atoms of a certain element each contain 11 protons and 1 valence electron. Which statement identifies this element and its chemical reactivity?The element is sodium, and it is highly reactive.The element is fluorine, and it is not reactive.The element is sodium, and it is not very reactive.
- 8. Multiple ChoiceA chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?The number of neutrons.The number of protons.The number of valence electrons.
- 9. Multiple Choice
The table below list three characteristics of an atom of an element.
An atom of which element is described by the data in the table?Radon (Rn)Cadmium (Cd)Rubidium (Rb) - 10. Multiple ChoiceA model of an atom is shown on your worksheet. An atonm of which element is represented by this model?Boron (B)Carbon (C)Sodium (Na)
- 11. Multiple ChoiceStudy the diagram on your worksheet. A student is asked to identify an element that is a pale-yellow brittle solid and does not conduct electricity. At which location would the element most likely be found?134
- 12. Multiple ChoiceBased on its chemical formula, which of the following substances is an organic compound?Urea, CH4N2OAmmonium sulfide, (NH4)22SSilane, SiH4
- 13. Multiple ChoiceWhich substance represented in this equation is classified as an element?COH2OH2
- 14. Multiple ChoiceHow many atoms are represented in the reactants in the equation on your worksheet?361224
- 15. Multiple ChoiceCoal contains carbon and other elements. Which of these is the best evidence that a chemical reaction occurs when coal burns?The shape of the coal changes.A new substance is produced.Coal is made up of more than one element.
- 16. Multiple ChoiceHow many protons, neutrons, and electrons are present in an atom of Cadmium, Cd, with a mass of 112 amu?48 protons, 112 neutrons, 64 electrons48 protons, 160 neutrons, 48 electrons48 protons, 64 neutrons, 48 electrons
- 17. Multiple ChoiceWhich two elements are in the same period?Sn and RbF and ClK and Ba
- 18. Multiple Choice
WHAT IS THE FORMULAE OF WATER
H₂O
CAO
HO
NONE OF THESE
UNE
- 19. Multiple Choice
WHICH APPARATUS IS THIS
measuring cylinder
beaker
conical flask
round bottom flask
- 20. Fill in the Blank
the formulae of glucose is
- 21. Multiple Choice
name this famous scientist
joseph preistly
stephen hawking
none of these
thomas edison
- 22. Multiple Choice
magnets are extracted from which of these
magnetite
igenous rocks
petroleum
siderite(iron ore)
- 23. Multiple Choice
What is the mass Number
Its the number of an atom, is its total number of protons and neutrons
Number of the atom's mass
its how many molecules are in your body
- 24. Multiple Choice
Is the Coca Cola a pure subtane
No
Yes
- 25. Multiple Choice
what is the abbreviation of Silver
Ag
Au
Cl
Aug
- 26. Multiple Choice
Which is the most important Element in our Bodies
Oxygen
Phosphorus
Sulfur
Sodium
- 27. Multiple Choice
Is Nitogen an element from our body
Yes
No
- 28. Multiple Choice
Which is the atomic mass of the Oxygen
1.00874u
4.567u
35.453u
15.999u
- 29. Multiple Choice
Is the Gold a pure substance
Yes
No
Maybe
- 30. Multiple Choice
Which is abbrebation of Sodium
Na
Ne
Sl
Sd
- 31. Multiple Choice
Is the Mass number a whole number
Yes
Nel
- 32. Multiple ChoiceA chemical change happens when...a substance is changed at the atomic levelbonds are broken and formeda new substance is madeall of the above!
- 33. Multiple ChoiceA catalystis added to a reaction to make it slow downbreaks apart and is changedprovides an energetic short cut to the products
- 34. Multiple ChoiceChemical Formulas ...are written in alphabetical orderrepresent the destruction or creation of atomsrepresent how atoms are arranged in a chemical reaction
- 35. Multiple ChoiceThe compounds or elements present at the end of a reactionreactantscatalystproductsenergy
- 36. Multiple ChoiceThe compounds and elements that are present at the beginning of a reaction:reactantscatalystproductsenergy
- 37. Multiple ChoiceWhich of the following reactions is a combustion reaction ?MgCO3 + O2 → MgO + CO2C3H8 + 5O2 → 3CO2 + 4H2O6CO2 + 6H2O → C6H12O6 + 6O26CO2 + 6H2O → C6H12O6 + 6O2
- 38. Multiple ChoiceWhat is the law of Conservation of Mass?A measure of how much mass is created or destroyed.Mass can neither be created nor destroyed during a chemical reaction.
- 39. Multiple ChoiceExplain this graphA catalyst is used to speed up the reaction rateThe catalyst provides a short cut to the productsThe red line shows how the catalyst saves energyAll of these choices
- 40. Multiple ChoiceWhich of the following is a decomposition reaction?MgCo3 --> MgO + CO2SO3 + H2O --> H2SO42 Mg + O2 --> 2MgO
- 41. Multiple ChoiceWhat kind of change is a phase change?Physical - it's still the same substancechemical - it's made of chemicals
- 42. Multiple Choice
Physics
Algebra
Maths
Geometry
- 43. Multiple Choice
Arts
Choir
Drama
Dancing
- 44. Fill in the Blank
- 45. Fill in the Blank
- 46. Multiple Choice
Maths
Ethics
Civics
Spanish
- 47. Multiple Choice
History
Philosophy
Spanish
Drama
- 48. Fill in the Blank
- 49. Fill in the Blank
- 50. Fill in the Blank
- 51. Fill in the Blank
- 52. Multiple Choice
Geography
History
Ethics
Philosophy
- 53. Multiple Choice
Literture
Liteture
Literature
Litaratore
- 54. Multiple Choice
Maths
Algebra
Physics
Chemestry
- 55. Multiple Choice
Maths
Algebra
Physics
Chemestry
- 56. Fill in the Blank
- 57. Multiple Choice
How many atoms of sodium (Na) are in one molecule of baking soda?
1
2
3
4
- 58. Multiple Choice
Ozone and Oxygen molecules are the same substance because they both are made only of oxygen atoms.
true
false
- 59. Multiple Choice
What is the chemical symbol for carbon?
C
Ca
Cn
Crn
- 60. Multiple Choice
Molecules bonded together make up atoms.
true
false
- 61. Multiple Choice
How many atoms make up one molecule of laughing gas?
1
2
3
4
- 62. Multiple Choice
When we combined vinegar and baking soda and created carbon dioxide what was the product?
vinegar
carbon dioxide and baking soda
carbon dioxide
vinegar and baking soda
- 63. Multiple Choice
In a chemical reaction or change a new substance is not created.
true
false
- 64. Multiple Choice
If there is a rise in temperature during a chemical reaction it is called a _________________ reaction.
endothermic
exothermic
- 65. Multiple Choice
Atoms are mostly made up of...
empty space
electrons
solids and liquids
- 66. Multiple Choice
What did the second man drink?
Arsenic
Hydrogen Peroxide
Helium Oxolate
- 67. Multiple Choice
What is Batman's favorite element?
Na
H
O
Cl
- 68. Multiple ChoiceWhat is a product?The starting substanceThe ending substance
- 69. Multiple ChoiceUsing the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).Hydrogen and Oxygenwater - 70. Multiple ChoiceUsing the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).Hydrogen and oxygenwater - 71. Multiple ChoiceAngelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?yes, because the properties changed and a new substance was made.no, because the properties did not change. - 72. Multiple ChoiceWhat is a reactant?The starting substanceThe ending substance
- 73. Multiple ChoiceWhich of the following are NOT signs that a chemical reaction occured?the properties changedbubbles of gas formedcolor stays the samesmells different
- 74. Multiple ChoiceWhat is a precipitate?a change in colora change in temperaturea solid formeda gas formed
- 75. Multiple ChoiceAlex wants to mix two substances together and to find out if a chemical reaction happens. What should he do?test the solubility before and after mixingmeasure the volume before and after mixingmeasure the mass before and after mixingtest the density of the before substance but not the after substances.
- 76. Multiple Choicea student mixes apple juice, water, and cinnamon together. Did a chemical reaction occur?Yes, because the apple juice changed the color of the water.yes, because the temperature stayed the samno, because the properties stayed the same.yes, because dissolving is always a chemical reaction.
- 77. Multiple ChoiceBurning is always a chemical reaction.Truefalse
- 78. Multiple ChoiceSandra was burning a vanilla candle. Was there a chemical reaction?no, because burning is never a chemical reaction.Yes, because the properties of the wick changed.yes, because heat was added.no, because the ash formed was a different substance.
- 79. Multiple ChoiceWhich of the following is NOT a chemical reaction?burning a marshmallow in a campfire.a campfireacid rain turning a copper roof green.Dissolving red Koolaid in water.
- 80. Multiple ChoiceWhich of the following is a chemical reaction?Burning bread in the toaster.melting wax in a microwave.dissolving salt in waterboiling water to make steam.
- 81. Multiple ChoiceA chemical change happens when...a substance is changed at the atomic levelbonds are broken and formeda new substance is madeall of the above!
- 82. Multiple ChoiceA catalystis added to a reaction to make it slow downbreaks apart and is changedprovides an energetic short cut to the products
- 83. Multiple ChoiceChemical Formulas ...are written in alphabetical orderrepresent the destruction or creation of atomsrepresent how atoms are arranged in a chemical reaction
- 84. Multiple ChoiceThe compounds or elements present at the end of a reactionreactantscatalystproductsenergy
- 85. Multiple ChoiceThe compounds and elements that are present at the beginning of a reaction:reactantscatalystproductsenergy
- 86. Multiple ChoiceWhich of the following reactions is a combustion reaction ?MgCO3 + O2 → MgO + CO2C3H8 + 5O2 → 3CO2 + 4H2O6CO2 + 6H2O → C6H12O6 + 6O26CO2 + 6H2O → C6H12O6 + 6O2
- 87. Multiple ChoiceWhat is the law of Conservation of Mass?A measure of how much mass is created or destroyed.Mass can neither be created nor destroyed during a chemical reaction.
- 88. Multiple ChoiceExplain this graphA catalyst is used to speed up the reaction rateThe catalyst provides a short cut to the productsThe red line shows how the catalyst saves energyAll of these choices
- 89. Multiple ChoiceWhich of the following is a decomposition reaction?MgCo3 --> MgO + CO2SO3 + H2O --> H2SO42 Mg + O2 --> 2MgO
- 90. Multiple ChoiceWhat kind of change is a phase change?Physical - it's still the same substancechemical - it's made of chemicals
- 91. Multiple ChoiceA _________ is a substance made of two or more DIFFERENT elements chemically combined.mixturecompoundsubstance
- 92. Multiple ChoiceA mixture can be separated by ________ means.physicalchemical
- 93. Multiple Choice"C" is the element symbol for which element?calciumcarbonchlorinecadmium
- 94. Multiple ChoiceThe characteristics or properties of metals includeshiny and solidductile and malleablelose electronsall of the above
- 95. Multiple ChoiceWhich particle contributes the negative charge to the atom?protonelectronneutronnucleus
- 96. Multiple ChoiceWater is an element?truefalse
- 97. Multiple ChoiceGold is an example of a(n)pure elementpure compoundpure mixture
- 98. Multiple Choice
What is the number of protons that the element in this image contain?
14
7
15
18
- 99. Multiple Choice
True or False? Neutrons have a negative charge
True
False
- 100. Multiple Choice
A pure substance that is a compound is made out of
particles of more than one type of atom
particles of the same type of atom
a mixture of two or more substances that can be physically separated
- 101. Multiple Choice
A molecule is
a singular particle of a particular element
another name for an element
2 or more atoms that are combined
- 102. Multiple Choice
protons
negative charge, nucleus
positive charge, shells
positive charge , nucleus
neutral charge, nucleus
- 103. Multiple Choice
electrons
no charge, nucleus
positive charge, nucleus
negative charge, shells
negative charge, nucleus
- 104. Multiple Choice
neutrons
no charge, shells
positive charge, nucleus
neutral, no charge, nucleus
negative charge, shells
- 105. Multiple Choice
What does a represent?
Proton
Neutron
Electron
- 106. Multiple Choice
What does b represent?
Proton
Neutron
Electron
- 107. Multiple Choice
What does c represent?
Proton
Neutron
Electron
- 108. Multiple Choice
What is the atomic mass of this element?
20
60
40
41
- 109. Multiple Choice
What is the symbol of this element?
Calcium
P
Ca
C
- 110. Multiple Choice
What is the atomic number of this element?
20
60
40
41
- 111. Multiple ChoiceA _________ is a substance made of two or more DIFFERENT elements chemically combined.mixturecompoundsubstance
- 112. Multiple ChoiceA mixture can be separated by ________ means.physicalchemical
- 113. Multiple Choice"C" is the element symbol for which element?calciumcarbonchlorinecadmium
- 114. Multiple ChoiceThe characteristics or properties of metals includeshiny and solidductile and malleablelose electronsall of the above
- 115. Multiple ChoiceWhich particle contributes the negative charge to the atom?protonelectronneutronnucleus
- 116. Multiple ChoiceWater is an element?truefalse
- 117. Multiple ChoiceGold is an example of a(n)pure elementpure compoundpure mixture
- 118. Multiple Choice
What is the number of protons that the element in this image contain?
14
7
15
18
- 119. Multiple Choice
True or False? Neutrons have a negative charge
True
False
- 120. Multiple Choice
A pure substance that is a compound is made out of
particles of more than one type of atom
particles of the same type of atom
a mixture of two or more substances that can be physically separated
- 121. Multiple Choice
A molecule is
a singular particle of a particular element
another name for an element
2 or more atoms that are combined
- 122. Multiple Choice
protons
negative charge, nucleus
positive charge, shells
positive charge , nucleus
neutral charge, nucleus
- 123. Multiple Choice
electrons
no charge, nucleus
positive charge, nucleus
negative charge, shells
negative charge, nucleus
- 124. Multiple Choice
neutrons
no charge, shells
positive charge, nucleus
neutral, no charge, nucleus
negative charge, shells
- 125. Multiple Choice
What does a represent?
Proton
Neutron
Electron
- 126. Multiple Choice
What does b represent?
Proton
Neutron
Electron
- 127. Multiple Choice
What does c represent?
Proton
Neutron
Electron
- 128. Multiple Choice
What is the atomic mass of this element?
20
60
40
41
- 129. Multiple Choice
What is the symbol of this element?
Calcium
P
Ca
C
- 130. Multiple Choice
What is the atomic number of this element?
20
60
40
41
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