What is the electron arrangement for aluminum?

2,8,3

2,8,5

2,8,7

2,8,8

2,8,10

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an intergrating center

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true