1. Which element is an alkali metal which has 4 energy levels? 2. Which element is in the Carbon group with 6 energy levels?
3. Which element has 2 valence electrons and 4 energy levels?
4. Which element is a halide and has 3 energy levels?

As a small change in a person's dna can cause a genetic disorder

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Donde se encuentra el adn nuclear en un organismo eucariota?