Which part of the atom has to stay the same for it to be the same element? number of neutrons

number of protons

number of electrons

number of protons, neutrons, and electrons

A teaspoon of dry coffee crystal dissolves when mixed in a cup of hot water. This process produces a coffee solution. How should the original crystals be classified?

Cole feels dizzy, and his stomach hurts. Cole has already vomited twice today and has diarrhea. Which of the following health problems does Cole most likely have?

How many protons and neutrons does aluminum

Prepare ~ 8.75 * 10-4 M CrO4 solution from the ~1.25 * 10-3 M K2CrO4 stock solution. Record the exact molarity of the stock solution. Calculate the required amount of stock solution to make 10.00 mL of dilute solution.

Why will an element that is brittle lacks luster and has 6 valence electrons be in group 16

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.

what mass of magnesium is required to react with excess nitrogen to produce 0.500 mol magnesium nitrade

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is