Match these items. 1. first nuclear reactor

curie

2. 1/0 n

atomic mass

3. splitting of nuclei into lighter elements

fusion

4. number of neutrons and protons

Fermi

5. builds heavier elements

neutron

6. discovered radioactivity

Becquerel

7. unit of radiation

fission

1. Fermi

2. Neutron

3. Fission

4. Atomic mass

5. Fusion

6. Becquerel

7. Curie

Explanation:

1. The invention of the first nuclear reactor was led by a scientist called ENRICO FERMI.

2. A neutron is a subatomic particle with the symbol "n". It has a mass number of 1 and a charge of 0, hence, it is debited by 1/0n

3. Nuclear fission is the splitting of nuclei into lighter elements.

4. Atomic mass or mass number is the number of neutrons and protons in the atom of an element.

5. Fusion is the building up of heavier elements from smaller ones. It is the opposite of fission.

6. Henri Becquerel is the physcist from France who discovered radioactivity.

7. Curie (Ci) is the unit of radiation, given after the scientist who contributed immensely to radioactivity, called MARIE CURIE.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse