The East African Rift Valley is a result of the Arabian Plate and the African Plate spreading apart at a divergent plate boundary on the continent. Which of the following are characteristics of this type of divergent plate boundary? a
long linear lakes, normal faults bounding central rift valley and deep earthquakes
b
deep earthquakes, subduction zone and violent volcanism
c
shallow earthquakes, normal faults bounding central rift valley and violent volcanism
d
normal faults bounding central rift valley, long linear lakes and shallow earthquakes

answer: lol

explanation:

lol

increased stability in the completion of fluorine's outer shell.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

i think its 5049.

i hope this !