Number of neutrons = mass number - atomic number = 40 - 19 = 21 answer
Answer:Obsidian is a rock and it does include minerals.
Explanation:
Answer:
nitrogen, oxygen, argon, carbon dioxide, neon, helium, krypton, hydrogen, and xenon. It does not include water vapor because the amount of vapor changes based on humidity and temperature.
A condensation reaction forming a glycosidic bond. so in other words a monosaccharide joining together to form a disaccharide.
The pulpy acidic fluid which passes from the stomach to the small intestine, consisting of gastric juices and partly digested food.
