Answer: lead
Lead has been used for gamma radiation shielding since the discovery of radioactive material & x-ray.
Answer:
the process shown here is endocytosis.
Explanation:
endocytosis is a process of taking something inside the cell..
Atomic mass Ca = 40 a.m.u
1 mole Ca ----------- 40 g
2.5 mols Ca -------- ( mass Ca )
Mass Ca = 2.5 x 40 / 1
Mass Ca = 100 / 1
= 100 g of Ca
hope this helps!
Its B homie i took the test !
Answer:
The helium atom is already stable and doesn't need to bond with other atoms or share electrons. Helium's lowest energy level can only hold two electrons, which are paired.