The colors emitted by fireworks are products of chemical reactions. These products can be harmful to the environment, that's why, in other countries, it is prohibited to use fireworks, unless during New Year or Christmas. For example, blue fireworks from copper release cancerous dioxins, green sparks come from barium which is radioactive,etc.
The formation of bands in a crystal
Explanation:
- hope that helped :)
Answer:
It is A. hydrogen -2 has one more proton
⛄ (4)HG
-This is because it has a freezing point below standard temperature.
Covalent bonding!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
