How many neutrons does element x have if its atomic number is 36 and its mass number is 70?

If the atomic number equals the number of protons there is in an element then the mass equals the number of neutrons and protons added together thus we have 36 protons plus x amount of neutrons = a mass of 70.  

36+x=70

x=34 neutrons

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs