Please help me Engineers are trying to plan for a bridge to be constructed in City A:
*A large river runs through the southern half of the city.
*The city is highly populated along the river banks.
A: Have the seismographs in the area picked up any recent activity?
B: What are the most recent satellite and infrared images around the city?
C: What can GIS maps tell us about the locations of flooding during heavy rainstorms?
D:What do the historical seismographs tell us about when earthquakes have occurred?

i need mutiple choices

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.