Question

multiple choice question
a 1 or 2 - letter shorthand representation of an element is a(n) ______.
o atomic mass number
o chemical symbol
o atomic weight number
o valence shell

Explanation:

In chemistry, elements are represented by 1 - or 2 - letter shorthands known as chemical symbols. For example, hydrogen is H and oxygen is O. Atomic mass number is the sum of protons and neutrons in an atom. There is no "atomic weight number" in standard chemistry terms. The valence shell is the outermost shell of an atom where valence electrons are located.

Answer:

B. chemical symbol