Question

Which of the elements represented by the following symbols is a metal?

• A. $^{16}_{8}A$
• B. $^{19}_{9}B$
• C. $^{24}_{12}C$
• D. $^{12}_{6}D$

Hint:

Metals are usually found on the left side of the periodic table, while non-metals are on the right.

Answer 1

The Correct Option is C

Step 1: Understanding Atomic Symbols:
The notation $^{A}_{Z}X$ represents:
$A =$ Mass number (protons + neutrons)
$Z =$ Atomic number (number of protons = number of electrons in neutral atom)
$X =$ Symbol of the element
Step 2: Analyzing Each Option:
(A) $^{16}_{8}A$ → Atomic number 8 → Oxygen → Non-metal.
(B) $^{19}_{9}B$ → Atomic number 9 → Fluorine → Non-metal.
(C) $^{24}_{12}C$ → Atomic number 12 → Magnesium → Metal.
(D) $^{12}_{6}D$ → Atomic number 6 → Carbon → Non-metal.
Step 3: Final Answer:
Among the given, the metal is Magnesium ($^{24}_{12}C$).