Passage IV

Figure 1 is a simplified periodic table giving the name, symbol, and atomic number (number of protons in the nucleus) for 20 elements. The elements in a column belong to a group. The elements in a row belong to a period.

Table 1 gives the melting point at 1 atmosphere (atm) of pressure (the MP), the boiling point at 1 atm (the BP), and the atomic radius for one or more of the elements in each group. The atomic radius, in picometers (pm; 1 pm = 10-12 m), is a measure of the size of an atom. Table 1 also lists an ion for each element and the ionic radius of that ion (a measure of its size).

24. Which of the following statements comparing the ionic radius to the atomic radius for a given element is best supported by Table 1 ? Compared to the size of an atom, the size of the ion is:

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

Comparing the atomic radium and ionic radius of each element in table 1, it can be seen that when the ion is positively charged, the ionic radius is smaller than the atomic radius;

When the ion is negatively charged, the ionic radius Both are larger than the atomic radius