Chapter 4
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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| Bohr Model | The scientist responsible for the Solar System model of the atom: the first person to place electrons into energy levels
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| Alkali Metal | The elements of Group I of the Periodic Table
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| Democritus | Ancient philosopher who coined the term "atomos"
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| Groups/Family | A horizontal row of elements in the periodic table
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| Elements that are chemically similar to each other
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| Noble Gases | The elements of Group VIII of the Periodic Table
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| John Dalton | Credited with the first scientifically-based theory about the atom [Theory with 5 postulates]
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| Mass Number | The sum of the numbers of protons and neutrons in the nucleus of an atom
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| James Chadwick | Credited with the discovery of the neutron
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| Oxidation Number | Number that indicates the number of atoms or polyatomic ions in a formula
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| Isotope | An atom that has the same number of protons As other atoms of the same element do but that has a different number of neutrons
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| J.J. Thomson | Scientist who discovered the electron and developed the 'Plumb Pudding Model" of the atom
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| Equivalent to the charge on an atom or ion
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| Cation | A positively charged ion
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| Halogens | The elements of Group VII of the Periodic Table
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| Scientist who discovered that the atom is mostly empty space and has a small, dense nucleus
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| Anion | A negatively charged ion
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| Atomic Number | This is the number of protons in an atom or an ion
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| Covalent Compounds | A compound composed only of non-metals
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| Diatomic Elements | 7 elements that always occur in pairs in nature; HONClBrIF
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| Alkaline Earth Metal | The elements of Group II of the Periodic Table
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| Polyatomic Ion | A group of covalently bonded atoms that have a charge
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| Valence Electrons | Particles found in the outermost energy level of the atom. The particle that directly takes part in bonding
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| Ionic Compound | Compound composed of a metal and a nonmetal
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| Nucleus | An atom's central region
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| Valence ? | According to the modern theory, a region in an atom where there is a high probability of finding electrons.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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