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 reaction is exothermic when Group of answer choices weak bonds break and strong bonds form. strong bonds break and weak bonds form. strong bonds break and strong bonds form. weak bonds break and weak bonds form.

What is one way to tell if a mineral is an element?

H2SO4 reacts with NaOH, producing water and sodium sulfate. What volume of 2.0 M H2SO4 will be required to react completely with 75 mL of 0.50 mol/L NaOH? show your work

Number of grams of perchloric acid in 4.25 x 10^-4 mol of perchloric acid

What energy is stored due to the position of an object

Which action by the British government was considered by American colonists to be a violation of their rights as Englishmen?

Calculate moles of oxygen atoms in 0.68mol of KMnO4

C2H6 (g) + O2 (g) → CO2 (g) + H2O (g) (not balanced) Determine the number of liters of CO2 formed at STP when 240.0 grams of C2H6 is burned in excess oxygen gas?

What type of change is baking a cake? Why?

The van der Waals forces of attraction between molecules always become stronger as molecular size 1) decreases, and the distance between the molecules increases 2)) increases, and the distance between the molecules decreases 3) decreases, and the