Which of the Following Is NOT True for the Atoms

question 105

Multiple Choice

Which of the following is NOT true for the atoms ¹²C, ¹³C, and ¹⁴C?

• A) They all have six electrons.
• B) They all have the same mass number.
• C) They all have the same atomic number.
• D) They are isotopes.
• E) They all have six protons.

---

Definitions:

Global Variable

A variable that is defined in the global scope, accessible and modifiable by any part of the code, across different functions and files.

Extern

The extern keyword in C and C++ is used to declare a variable or function in another file, indicating that its definition will be found elsewhere.

Source Code

The original code written by a programmer in a high-level programming language before it is compiled into machine code.

Declaration Statement

A statement in programming that specifies the type and possibly the initial value of one or more variables or constants.