Beryllium has 4 protons, 4 electrons and 5 neutrons
I’m not sure but I think the right is neutral or it’s could be acidic
Answer:
A. heavy nuclei
Explanation:
They absorb neuyrons in order to hain stability.
Answer:
less, decreases
Explanation:
When the pressure of an atmosphere occurs because of the force exerted so at the time of the higher altitudes, the air mass i.e. above the earth should be less as the air is attracted towards surface of an earth because of the gravity and air contains the mass that shows near the surface area so automatically the air density reduced due to which the mass also decreased