Answer: 3
Explanation:
All elements in group 3 have 3 levels of energy.
Na (sodium) has 3 valences the inner has 2 electrons, the middle has 8 electrons and the outer has 1 electron.
This will continue across the group 3 adding one more electron to the outer valence until Ar (argon).
Remember the Octet rule of 8..?
Answer:
Organs
Explanation:
cells make up tissues and tissues make up organs
Answer:
Ozone molecules in the stratosphere are constantly being produced and destroyed by different types of UV radiation from the sun. ... However, scientists have discovered that certain chemicals react with UV radiation in the stratosphere, which causes them to break apart and release chlorine or bromine atoms.
Explanation:
Answer:
The rapid emergence of resistant bacteria is occurring worldwide, endangering the efficacy of ... The antibiotic resistance crisis has been attributed to the overuse and misuse of these ... In response, new beta-lactam antibiotics were discovered, developed, and deployed
Explanation: