Question

1. na₂cro₄ # of molecules: 1 # of elements: 3 name of element: # of atoms: 2 1 4 total # of atoms: 7 the #4 is a subscript (coefficient or subscript)

Explanation:

Step1: Identify elements in $Na_2CrO_4$

The elements are sodium (Na), chromium (Cr), and oxygen (O).

Step2: Determine number of each atom

• Sodium (Na): Subscript 2 means 2 atoms.
• Chromium (Cr): No subscript implies 1 atom.
• Oxygen (O): Subscript 4 means 4 atoms.

Step3: Calculate total atoms

$2 + 1+4=7$ atoms.

Answer:

Name of element: Sodium, Chromium, Oxygen

of atoms: 2, 1, 4

Total # of atoms: 7
The #4 is a subscript.