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Science Test
Atoms and The Periodic Table
| Question | Answer |
|---|---|
| atomic structure(parts, charge, mass) | proton, positive, 1, neutron, zero charge, 1, electron, negative, 1/2000 |
| what is a nucleus | tiny core in the center of an atom with most of the atoms mass and all of its positive charge. |
| what is atomic number | the number of protons in the nucleus |
| what is mass number | the number of protons and neutrons in the nucleus |
| what is an isotope | ATOMS OF THE SAME ELEMENT THAT HAVE DIFFERENT NUMBERS OF NEUTRONS |
| what is atomic mass | the average mass of all known isotopes of an element |
| stable vs unstable | stable- if it stays together; unstable- too few or too many neutrons compared to protons |
| alpha particle decay | when the nucleus ejects two protons and two neutrons |
| beta particle decay | when a neutron in the nucleus splits into a proton and an electron. |
| how many electrons per energy level and limits | 1st level - max 2/ 2nd level - max 8/ 3rd level - max 8/ 4th level - max 18 |
| where do the most energetic electrons go? | the farthest away from the nucleus |
| how is the period number related to the energy levels? | the period number is the amount of energy levels |
| how is the periodic table organized? | in order of increasing atomic number with the lightest element on the upper left and the heaviest element on the bottom right |
| horizontal rows - name, how many, whats in common | periods, 7, same amount of energy levels |
| vertical columns - name, how many, whats in common | groups, 18, same valence electrons |
| alkali metals (location and properties) | group 1, soft and silvery and highly reactive |
| noble gases (location and properties) | group 18, do not naturally form chemical bonds and are rarely found in pure form. |
| transition metals (location and properties) | group 3-12, good conductors of heat and electricity, metals. |
| halogens (location and properties) | group 17, very reactive and rarely found in pure form and are usually toxic gases or liquids |
| metals (location, properties, and ductility) | left side of line, good conductors of heat and electricity |
| semi-metals (location, properties) | along the line, metalloids |
| nonmetals ( location, general properties) | right side of line, poor conductors of heat and electricity |
Created by:
prettypinkunicorns
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