Nuclear Radation,, Acid ad Base

Which statement is true about all the isotopes of an elements?

•   They have the same  mass number

• They have different number of protons

• They have the same number of protons

• They have the same number of neutron

The atomic number for carbon is six ( 6). How many neutrons are in Carbon-13.

• 6

• 7

• 12

• 13

If radioactive material has a 10-y half-life what fraction of the material will be left after 30 years?

• One-half

• One-third

• One-fourth

• •One-eight

Radioactive isotopes of which element are used to study the thyroid?

• Uranium

•   Carbon

•   Iodine

• •Cadmium

What keeps the particles of a nucleus together

• strong force

• weak force

• Electromagnetic Force

• Gravity

What describes an isotope’s half-life

• A constant time interval

• A random time interval

• An Increasing time interval

• A decreasing time interval

In nuclear fission, a heavy nucleus splits into:

• One smaller nucleus

• Two or more smaller nuclei

• A single proton

• An electron and a positron

What element is commonly used as fuel in nuclear fission reactors?

• Hydrogen
  

• Uranium-235
  

• Carbon-14

• Oxygen-16

Which of the following is NOT a type of nuclear radiation?

• Alpha particles

• Beta particles

• Gamma rays

• Microwaves

Which describes all nuclei with more than 82 protons?

• Radioactive

• repulsive

• Synthetic

• Stable