Answer:
Nitrogen has an atomic number of 7 (Z=7) because it has 7 protons in its nucleus. Some nitrogen atoms have an atomic mass number of 15 (A=15). A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons
Population Changes
Change is inevitable in nature.
Ecosystems have to cope with sudden changes like hurricanes and long term changes like ice ages.
Healthy Ecosystems will withstand the stress caused by change. Populations will recover or adapt to a new climate.
Population Changes
Stressed ecosystems do not handle change well.
They are already fragile or out of balance. They react with population spikes (boom) and population crashes (bust)
Population spike (boom)- Increase in population happens quickly.
Population crash (bust)- Decrease in population happens quickly
Sometimes a stressed ecosystem will not recover from change.
Population Effects Ecosystems
If a change affects one population in an ecosystem, the change will be felt throughout the system over time.
When one population of organisms increases or decreases, other populations will be affected because all living things are interrelated.
The number of protons in an uncharged atom equals the number of electrons.
Answer:
Radioactive and are often called radioisotopes
Answer:
NH3 and NH4+
Explanation:
NH4+ is the conjugate acid of the base NH3.
