Answer:
D) largest mass extinction event in Earth's history
Explanation:
The cambrian era started following the pre-cambrian extinction
Electrons are found outside the nucleus.
Answer: To increase the nitrogen in the soil Cleo can make compost to put in her garden
Explanation:
Some plants and foods put in compost produce nitrogen so making compost out of it and putting it in the soil would increase the amount.
Answer:
The Bohr Model has an atom consisting of a small, positively-charged nucleus orbited by negatively-charged electrons. Here's a closer look at the Bohr Model, which is sometimes called the Rutherford-Bohr Model.
Explanation:
