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15 Cards in this Set
- Front
- Back
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What particle in an atom's nucleus has no charge?
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neutron
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In the electron cloud model of the atom, what does the electron cloud contain?
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electrons and a lot of empty space
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A scientist knows that a pure substance has six protons in the nucleus of each of its atoms. What can the scientist conclude?
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The pure substance can be identified as a specific element.
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In a lab, a student observes a sample of an element. It is brittle and a poor conductor of heat, and it cannot be hammered into sheets. What is it?
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nonmetal
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The element zirconium is a metal. Where will zirconium be found on the periodic table?
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on the left side of the table
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The measure of the amount of solute dissolved in a solvent is called what?
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concentration
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When you look at the formula for water, you can tell that it is what?
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a compound
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JJ Thomson's plum pudding model of the atom shows what?
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It shows that the atom has negatively charged particles called electrons.
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A student has a mixture of small pieces of iron fillings and sand. How can the student separate the mixture?
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The student can use a magnet to separate the mixture.
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How can the solubility of a solution be decreased?
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You can cool the solvent.
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Be able to look at a periodic table and tell how many protons an element has in its nucleus.
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Use a periodic table and practice. The atomic number, located right above the symbol, shows the number of protons.
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Be able to look at a periodic table and tell which elements will have similar chemical properties.
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Look at the COLUMNS in the periodic table.Elements in the same column react similarly with other substances.
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Which elements touch the zig zag line in the periodic table?
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metalloids
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A student performs a pH test on liquid soap and finds that its pH is between 11 and 12. The liquid soap is what?
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basic
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An artist needs a chemical compound that will react strongly with a metal in order to form a new compound. What substance should she pick?
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an acid
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