calculate e,p,n in SO42-
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Determine the number of protons, neutrons, and electrons in a 210Pb2+ ion. The atomic number of lead is 82, which means this ion contains 82 protons. Since it has a charge of +2 , this ion must contain 80 electrons.What is the formula for so42?
SO₄²-
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Fill in the blanks with infinitives gerunds and participle.
1.___________fault is easy (find) plain infinitives
2.____________rudely is the bad think (talk)
3.________is a bad for health (smoke)
4.His greatest pleasure is_________
5.the teacher was about _________
6.we eat_________(live)
7.this is not the time__________
8.I have come_______you
9.He was quick_________
10.Everyone wanted_____________the celebrate
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