An Atom That Has an Atomic Number of 20 and a Mass

question 9

Multiple Choice

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has:

• A)an atomic number of 21 and a mass number of 42
• B)an atomic number of 20 and a mass number of 40
• C)22 neutrons and 20 protons
• D)22 protons and 20 neutrons

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Definitions:

Header File

In programming, a file containing declarations of functions, macros, and variables which can be included in multiple program files via preprocessor directives.

Gets()

A function that reads a line from stdin into the buffer pointed to by its argument until a newline character or EOF.

Character Array

A sequential collection of characters, typically used to store strings in programming languages like C and C++.

Gets()

A function in C programming used to read a string from the standard input (stdin) until a newline character is encountered.