lấy 20 giọt dung dịch na2s2o3 1%. lấy vào ống khác 10 giọt na2s2o3 1% và 10 giọt nước cất. cùng một lúc nhỏ vào hai ống , mỗi ống một giọt h2so4 2N. lắc đều và nhận xét xem ống nào đục trước

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

c.

explanation:

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.