Why did Mendeleev put bromine (Br) and chlorine (Cl) in the same group on the periodic table

They have similar masses.

They have similar properties.

They are both gases.

They are similar alphabetically.

A 5.00 ml sample of this koh solution is added to a 250 ml volumetric flask, and water is added to the mark. what is the new molarity of k + ions in this solution?

Alloys are only formed when a metal bonds with a non-metal. a. True b. False

How is a compound different from a miture?

Predict whether the following solutions are acidic, basic, or nearly neutral: a. NaBr, b. K2SO3, c. NH4NO2, d. Cr (NO3). the answer is neutral, basic, acidic, acidic and i am not sure why

Which scientist discovered that other galaxies and stars were moving away from us at speeds proportional to how far they were away?

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

In which orbital does an electron in a bromine atom experience the smallest?