Why did mendeleev leave blanks in his early version of the periodic table?

What is produced when iron-bearing silicate minerals in the desert landscape oxidize?

Which of the following compounds would contain a total of three carbon atoms A. 1-butane b. propane c. 2-triene d. heptane

What energy form is a bow and arrow?

Calculate zeff for a valence electron in an oxygen atom.

What is the maximum number of d orbitals in a principal energy level?

If a new substance is formed in a chemical reaction, what atoms do they consist of?

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong