Atomic Numbers and Electron Configurations Answers

Which of the following did Antoine Lavoisier correctly characterize as an element?

Developed the law of octaves:

Arranged elements by atomic number:

iodine (I):

Organized elements into four groups based on properties:

Identified triads of elements with similar properties:

Use the periodic table to classify each of the elements below.cadmium (Cd):

potassium (K):

The nonmetals include which of the following groups? Use the periodic table to answer the question. Check all that apply.

Magnesium (Mg):

Fluorine (F):

Nickel (Ni):

Neon (Ne):

vanadium (V):

xenon (Xe):