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Chapter 2: Problem 24

Which period of the periodic table (a) has no metals? (b) has no nonmetals? (c) has one post-transition metal and two metalloids?

Short Answer

Expert verified
Answer: (a) Period 1 has no metals, (b) Period 6 has no nonmetals in the range of groups 3 to 11, and (c) Period 4 has one post-transition metal and two metalloids.

Step by step solution

01

Understanding the periodic table layout

The periodic table is arranged in such a way that elements with similar properties are grouped together in columns or groups, and each row is called a period. Metals are usually found on the left-hand side and middle of the table, nonmetals on the right-hand side, and metalloids near the border between metals and nonmetals.
02

Finding the period with no metals

To find a period with no metals, we need to look at the right-hand side of the periodic table where nonmetals are predominantly located. Examining the periodic table, we can see that this is true for period 1, which contains only hydrogen and helium. Answer (a): Period 1 has no metals.
03

Finding the period with no nonmetals

Now, we will look at the left-hand side and middle of the periodic table to find a period with no nonmetals. Examining the periodic table, we notice that all the elements in period 6 from group 3 to group 11 are metals, and there are no nonmetals in this range. Answer (b): Period 6 has no nonmetals in the range of groups 3 to 11.
04

Finding the period with one post-transition metal and two metalloids

Finally, let's find a period with one post-transition metal and two metalloids. Recall that metalloids are found near the border between metals and nonmetals. For this question, we need to examine the post-transition metals (found to the right of transition metals) and the metalloids. By examining the periodic table, we can identify that period 4 matches these conditions. In period 4, we have aluminum as post-transition metal (group 13), and silicon and germanium as metalloids (group 14). Answer (c): Period 4 has one post-transition metal and two metalloids.

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Most popular questions from this chapter

WEB See the definition of isobars in Question 15. Consider Na-21 and write the nuclear symbol for (a) an isotope of Na-21 that has one more neutron than \(\mathrm{Na}-21\). (b) an isobar of Na-21 with atomic number 10 . (c) a nucleus with 11 protons and 12 neutrons. Is this nucleus an isotope of \(\mathrm{Na}-21\) ?

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