Q37E - Chemistry (OpenStax)

Question

Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal:

1. Uranium 
2. Bromine
3. Strontium
4. Neon
5. Gold
6. Americium
7. Rhodium
8. Sulfur
9. Carbon
10. Potassium

Step-by-Step Solution

Answer

1. Metal, inner transition metal
2. Non-metal, representative element
3. Metal, representative element
4. Non-metal, representative element
5. Metal, transition element
6. Metal, inner transition metal
7. Metal, transition metal
8. Non-metal, representative element
9. Non-metal, representative element
10. Metal, representative element

Step1. Classify for part (a)

Classifying uranium as metal, nonmetal and in main groups - From periodic table, we conclude that it’s atomic no is 92 and it is a member of actinide group. That’s why it is a metal and inner transition metal.

Step2: Classify for part (b)

Classifying bromine as metal non-metal and in main group – From periodic table, we know that it is present in 4^th period 17^th group and its atomic no. is 35. So, it’s a non-metal representative element.

Step3: Classify for part (c)

sifying strontium as metal, non-metal and in main group – from periodic table, we conclude that its atomic no. is 38 and it is present in 2^nd group and 5^th period. So, it is a metal, representative element.

Step4: Classify for part (d)

Classifying neon as metal, non-metal and in main group – from periodic table, we conclude that atomic no. of neon is 10 and its group is 18 and period is 2. So, it is a non-metal and representative element.

Step5: Classify for part (e)

Classifying gold as metal, non-metal and in main group – From periodic table, we conclude that its atomic no is 79. And it is present is 11^th group and 6^th period . So it is a metal and transition element.

Step6: Classify for part (f)

Classifying americium as metal, non-metal and in main group – From periodic table, we know that it is also present in actinides group and 7^th period and its atomic no. is 95 .So it is a metal, inner-transition metal.

Step7: Classify for part (g)

Classifying rhodium as metal, non-metal and in main group – From periodic table, we know that it’s atomic no. is 45 and it is present in 9^th group, 5^th period. So, it is a metal, transition metal.

Step8: Classify for part (h)

Classifying sulfur as metal, non-metal and in main groups – From periodic table, we conclude that it’s atomic no. is 16 and it is present in 3^rd period , 16^th group. So, it is a non-metal, representative element.

Step9: Classify for part (i)

Classifying carbon as metal, non-metal and in main group – From periodic table, we conclude that its atomic no. is 6 and it is present is 2^nd period and 14^th group. So, it is a non- metal representative element.

Step10 : Classify for part (j)

Classifying potassium as metal, non-metal and in main group – From periodic table, we conclude that it’s atomic no. is 19 and it is present in 1^st group 4^th period. So, it is a metal, representative element.