Concave is not a type of mechanical wave because it doesn’t need a medium for propagation.
Answer:
Electrons
Explanation:
Because the nucleas is In the middle and the Electrons surround it
Answer:
A
Explanation:
27 us the number of protons when we subtract 27 from 59 it will be 32 because a mass number is the sum of proton and neutron but tell u more on the comment
