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).
23. According to Figure 1 and Table 1, for the Period 3 elements in Groups 1A-4A and the ions listed for those elements, as atomic number increases, ionic radius:
Your Answer is
Correct Answer is C
Explanation
According to the period 3 and Groups 1A-4A mentioned in the question stem, the corresponding elements should be Na, Mg, Al, Si, and their Ionic radius decreases as the atomic number increases