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).
20. According to Figure 1 and Table 1, which of the following graphs best shows how MP varies with atomic number for the Group 2A elements listed in Table 1 ?
Your Answer is
Correct Answer is F
Explanation
Look at figure 1 first, the elements corresponding to Group 2A are Be, Mg, Ca...the corresponding Mp in table 1 are 1280, 650, 850 respectively, so you should choose F