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11 Cards in this Set

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