What is a volcano that is erupting or has erupted in the last 100 years called?
a- semi-dormant volcano
b- active volcano
c- extinct volcano
d-lava filled volcano

B- Active volcano

Hope this helps :D

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom