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11 Cards in this Set
- Front
- Back
What is a negatively charged paricle called?
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Anion
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Do elements that have the same # of valence electrons have similar chemical properties?
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Yes
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Does the Atom have a sharply defined outer boundary?
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No
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What are elements in the periodic table arranged according to?
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their atomic number
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In the periodic table, elements that have similar properties are grouped in vertical columns or horizontal rows?
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vertical columns
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of the elements helium, iron, sulfur, calcium, potassium, which one would react in a way most like sodium?
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potassium
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which 2 have nearly identical masses? protons/neutrons/electrons
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neutrons and protons
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true or false. Neutral atoms have the equal numbers of protons and electrons.
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true
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is there a limit to the number of electrons that can occupy each energy level surrounding an atom?
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yes
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which element is least reactive out of aluminum, magnesium, helium, hydrogen,oxygen?
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helium
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hydrogen-1, hydrogen-2, hydrogen-3 are isopopes that have the same # of protons/neutrons/electrons?
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neutrons
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