Periodic Trend: Cumulative - Video Tutorials & Practice Problems
Periodic Trends are patterns present in the periodic table based on an element's size and electron distribution.
Periodic Trend: Cumulative
Periodic Trend: Cumulative Example 1
So here it says elements with blank first ionization energies and more blank electron affinities generally form cations. So remember a cation is a positive ion and if you're trying to make a positive ion that means that you're a metal. Remember metals tend to form cations.
Now that we know that it's a metal, let's think about electron affinity and ionization energy for metals. Metals tend to have low first ionization energies. It it's easy to remove their electrons so they can become a positive ion. So here that would mean that the answer is either A or C.
And let's think about electron affinity. Remember, as we head towards the top right corner away from the metals are electron affinity will increase, it becomes more exothermic. So here we're doing the exact opposite. Metals are more to the left, so they're not more exothermic, they're more endothermic. So here we're going to have C as our best answer.
Which of the following statements is false?
For main-group elements, the atomic radius increases going down a group because:
Which of the following statements is false?
a) The electron affinity of phosphorus is less exothermic than those of both silicon and sulfur.
b) The second ionization energy of oxygen is less than the first ionization of fluorine.
c) As the principal quantum number of an atom increases the effective nuclear charge will increase.
d) Cations are smaller than their parent atoms.
e) The second electron affinity of an atom will be more exothermic than the first electron affinity.
Which of the following statements is true?
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