Answer:
the answer is 20000.3&$&$_$
Answer:
D ultra violet rays cause sunburn
Answer:
The answer is 33 .
Explanation:
The mass number of an atom is the atomic mass which consists of proton and neutron. This atom has 16 protons and 17 neutrons so it has a mass of 33 :
proton number + neutron number = nucleon number / atomic mass
16 + 17 = 33
Beryllium fluoride I believe is the correct answer