Answers: 2
Chemistry, 22.06.2019 01:30
There are main groups in the modern periodic table of elements
Answers: 1
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
Chemistry, 22.06.2019 06:30
(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.
Answers: 1
Chemistry, 22.06.2019 10:30
Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?
Answers: 3
What system includes oxygen nitrogen and ozone ?...
History, 22.10.2020 18:01
Computers and Technology, 22.10.2020 18:01
Mathematics, 22.10.2020 18:01
Law, 22.10.2020 18:01
Mathematics, 22.10.2020 18:01
English, 22.10.2020 18:01
Spanish, 22.10.2020 18:01
Mathematics, 22.10.2020 18:01
Mathematics, 22.10.2020 18:01
Mathematics, 22.10.2020 18:01
History, 22.10.2020 18:01