Chemistry, 11.10.2020 14:01 milkshakegrande101
5. A beaker is filled with water and has an initial volume of 100 ml. After an object is placed into
the beaker, the volume of the beak measures 150 ml. If the mass of the object is 200 grams,
what is the density of the object?
Answers: 2
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There are main groups in the modern periodic table of elements
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What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics
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Chemistry, 22.06.2019 05:00
1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false
Answers: 3
5. A beaker is filled with water and has an initial volume of 100 ml. After an object is placed into...
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