PRELIMINARY STAGE 2025
Contest 35
Adisadel College (ADISCO): 57 points (Winner)
Assin State College
Yaa Asantewaa Girls' SHS
QUESTION
Identify the given element as main group metal, transition metal, metalloid, or transuranium element.
1. Astatine.
ANSWER: Metalloid
2. Caesium.
ANSWER: Main group metal
3. Zirconium.
ANSWER: Transition metal
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PRACTICE QUESTIONS
1. QUESTION: Identify the element germanium as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Metalloid
SOLUTION:
Germanium, in Group IV below silicon, is a semiconductor with properties between those of metals and non-metals.
2. QUESTION: Identify the element barium as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Main group metal
SOLUTION:
Barium is an alkaline earth metal in Group II (s-block).
3. QUESTION: Identify the element plutonium as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Transuranium element
SOLUTION:
Plutonium comes after uranium in the periodic table, so it is a transuranium element.
4. QUESTION: Identify the element tungsten as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Transition metal
SOLUTION:
Tungsten is a d-block metal with the highest melting point of all metals.
5. QUESTION: Identify the element antimony as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Metalloid
SOLUTION:
Antimony, in Group V, has properties between those of metals and non-metals.
6. QUESTION: Identify the element americium as a main group metal, transition metal, metalloid, or transuranium element.
ANSWER: Transuranium element
SOLUTION:
Americium comes after uranium in the periodic table and is made artificially.