Passage I

Figure 1 is a simplified periodic table that gives the atomic number, symbol, name, and electronegativity (EN) of 21 elements. Rows of elements are called periods. Columns of elements are called groups.

Figure 1 adapted from Nivaldo J. Tro, Chemistry: A Molecular Approach, 2nd ed.©2011 by Pearson Education, Inc.

The greater the EN of an element, the more strongly an atom of that element attracts electrons to itself in a chemical bond. The greater the absolute value of the differ­ence between the ENs of 2 elements, | EN1 - EN2 |, the more polar is the bond between atoms of the elements. Figure 2 gives, for each of 6 compounds, | EN1 - EN2 | and the bond energy at 298 K (the energy needed to break all the bonds in 1 mole of a compound at 298 K).

Figure 2 adapted from James G. Speight, Lange's Handbook of Chemistry, 16th ed. ©2005 by McGraw-Hill, Inc.

3. The atomic number of an element is the number of protons in the nucleus of an atom of that element. According to Figure 1, the nucleus of an atom of which of the following elements contains more protons than does an atom of sulfur?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

The element with a larger atomic number than S should be located after S in figure 1, so only K is the element that matches potassium