Answer:
it is because a number of factors, including sample surface cleanliness and temperature, can prevent chunks of alkali metals from exploding on contact with water. The team eliminated those variables and others by using a sodium-potassium alloy that remains liquid at room temperature and a droplet delivery system featuring a calibrated syringe.
Answer:
natural flame,oxidising flame
A is the answer because different waves on the spectrum can create different magnitudes of disturbance.
Answer:
2:8:7
Explanation:
The first shell can accommodate a maximum of 2 electrons, while the second level accommodates a maximum of 8 while the third last cell takes up the remaining 7 electrons