The atomic radii decreased across Period 3 and increased down Group 17.The ionic radii decreased across a period for the positive sodium and magnesium ions, increased for phosphorus, and then decreased again.The electron affinity and electronegativity increased across Period 3 and decreased down Group 17.<span>The ionization energy increased across Period 3 and decreased down Group 17.</span>
44÷22=2 g/cm3 so A is correct answer
The correct answer is: -3 (minus three)
Explanation:
To find the overall charge, we add electrons and protons. Make sure that you use the negative sign for an electron and positive sign for proton.
There are 10 electrons. It means the charge is "-10"
There are 7 protons. It means the charge is "+7"
Add both of them:
+7 - 10 = -3
Therefore the overall charge on this ion is -3.
Steel wool rusts faster because more Surface Area is exposed in a steel wool compared to the iron nail and more surface area means faster rusting rates
have a nice day! (^o^)
