The correct symbol for the isotope of potassium with 22 neutrons is _____.^41_19
ID: 1067787 • Letter: T
Question
The correct symbol for the isotope of potassium with 22 neutrons is _____.^41_19 K^19_41 K^37_15 P^15_37 P^22_19 K What is the correct formula for the oxide ion? O^2- O O^+ O^2+ O^3+ Which one of the following compounds contains an ion with a 3^+ charge? KCl Na_2O FeCl_3 CuCl MgCl_2 The compound MgCl_2 is named ______. magnesium chlorine magnesium dichloride magnesium (II) chloride magnesium chloride dimagnesium chloride The correct formula for copper (II) chloride is _______. Cu_2Cl_4 CuCl_4 Cu_2Cl_2 Cu_2Cl CuCl_2Explanation / Answer
28.
The atomic number of potassium is 19.
The atomic number = number of protons = 19.
Number of neutrons = 22.
Therefore the mass number = number of protons + number of neutrons = 19+ 22 = 41
The correct symbol for the isotope of potassium is 41 K19 . Thus atomic number subscript and mass number superscript.
So the answer is A
29.
An oxide ion is a negatively charged oxygen atom. This means it has gained two electrons from another atom. Thus, it is represented as O2- (2- is super scripted). It is also an anion, which is a negatively charged ion.
The correct formula for the oxide ion O2-. So the answer is A
30.
The answer is C. In FeCl3, The Fe has 3+ charge
31.
MgCl2 is Magnesium Chloride. So the answer is D
32.
The chemical formula for copper(II) chloride is CuCl2. So the answer is E
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