Multiple Choice
The atomic mass of an element is equal to
A) its mass number.
B) its atomic number.
C) one-twelfth of the mass of a carbon-12 atom.
D) a weighted average mass of all of the naturally occurring isotopes of the element.
E) the average mass of all of the naturally occurring isotopes of the element.
Correct Answer:

Verified
Correct Answer:
Verified
Q8: Sulfur has 16 valence electrons.
Q10: Valence electrons are electrons located _.<br>A)in the
Q13: The ionization energy of atoms<br>A)decreases going across
Q14: The electron configuration of potassium is 1s22s22p63s1.
Q15: Protons and neutrons are located in the
Q26: What is the symbol of the element
Q41: How many protons are in an isotope
Q59: The number of neutrons in an atom
Q64: Chromium is a metal.
Q81: Write the electron arrangement for the atom