Atoms of elements that are in the same group have the same number of

a-protons

b-neutrons

c-valence electrons

d-protons and neutrons

During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4. What is the amount of the leftover reactant? 0.74 grams of methane 0.89 grams of methane 1.22 grams of oxygen 1.45 grams of oxygen

The most common sulfur ion has a charge of

What is the PH of a 0.05M solution of the strong base Ca (OH) 2 at 25C

Which of these elements would be assigned the highest electronegativity value? k br ba si

Who is Ernest Rutherford

How many protons and electrons in Arsenic ion

What happens to the volume as the mass increases

How many grams of oxygen are formed when 8.20 moles of KOH are formed? 4 KO (s) + 2 H2O (l) → 4 KOH (s) + O2 (g)

It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Look at that! Chemical and physical changes taking places on your birthday cake!

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas, H2, is produced with the formation of an aluminum chloride, AlCl3, solution.