Practice Exams
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A unit containing two or more elements held together | Compound
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| The symbol for carbon | C
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| Which is the largest element | Sodium
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| smallest particle of a chemical compound which still retains the properties of the compound | Molecule
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| Particle with -1 charge | Electron
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| Greater than 99% of the atoms of an element are: | Identical
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| An atom can lose or gain electron(s) and become known as | An ion
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| What is the formula (molecular) weight of the compound represented by the formula H2O? | 18 grams
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| What is the basic unit for time in the metric system? | Second
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| How many significan figures are there in the number 456.0007 ? | 7
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| Most known elements are found in | Nature
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| The tall eight columns of the Periodic Table are known as the: | Representative elements
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| The most energized electrons of an atom are located: | In the outermost energy shell
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| The number of protons of an atom is equal to the number of: | Electrons
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| The atomic weight (atomic mass) of an atom is equal to the __________of that atom: | Number of protons plus the number of neutrons
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| The decaying of organic matter is an example of what type of property? | Chemical
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| A chemical reaction between a metal, such as zinc, and HCl is an example of what type of property? | Chemical
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| A measurement in the lab which is very close to the true value in a chemistry handbood is said to be: | Accurate
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| The short columns located in the middle of the Periodic Table are referred to as: | Transition elements
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| Elements that do not react belong to which group on the Periodic Table? | VIII
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| Elements which belong to Group VIII of the Periodic Table have a __________in their atoms and do not react: | filled outer energy shell
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| Most atoms of an element have the same number of _______in their nuclei: | neutrons
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| In which Group of the periodic Table will the elements become ions by either gaining OR losing an electron? | Group IV A
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| The properties of an element depend on the electrons where in relation to its atoms? | Farthest from the nucleus
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| What kind of property is represented by the boiling point of water? | Physical
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| Balance the equation Mg + O2 | 2MgO
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| Balance the equation KClO3 = | 2KCl + O2
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| balance the equation 2KCl + O2 = | KClO3
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| In the balanced equation, what is the total of all coefficients? KI + Pb(NO3)2 = KNO3 + PbI2 | 6
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| A chemical bond which is formed as a result of a sharing of an electron(s) between atoms is what type of bond? | Covalent
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