If element x has 89 protons, how many electrons does it have?

What happen to temperature & pressure as you go deeper into the earth

Describe how crystals of calcium chloride can be made from calcium carbonate and dilute hydrochloric acid.

Consider the reaction: HCl (aq) + NaOH (aq) → NaOH (aq) + H2O (l) How much 0.113 M NaOH solution will completely neutralize 1.25 L of 0.228 M HCl solution?

Which of the following statements about the formation of polypeptides from amino acids is true? a. A bond forms between the carboxyl functional group of one amino acid and the amino functional group of the other amino acid. b.

4. Which of the following is a pseudo-noble-gas electron configuration? O A 1s22s22p3s23p%3d10 OB 1s22s22p63s23p6 OC 1s22s22p63s2305 OD 1s22s²2p63s23d10452

If an element has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass?

What did the Cherokee do to assimilate? Check all that apply They invented a writing system. They resisted white settlement. They wrote a constitution. They planted cotton and farmed.

Which of the following correctly compares the radii of Cl and Cl-? Cl has a larger radius than Cl - because Cl has an additional energy shell. Cl has a smaller radius than Cl - because Cl has an expanded electron cloud.

When a stretched string is vibrated up and down with a particular frequency, it causes a standing wave to be produced.

Find the concentration of a solution with 30 grams of solute in 250 grams of solution.