Question

2) Sodium metal burns with a blue flame.​

Answer 1

Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame.

Answer 2

$A number of factors may\\ precipitate A number of factors may\\ precipitate accidents in the home\\ Poor supervision or poor\\ housing conditions can increase\\ the risk of accidents in the home\\ for children</p><p></p><p> in the home\\ Poor supervision or poor\\ housing conditions can increase\\ the risk of accidents in the home\\ for children</p><p></p><p>$