Answer:

1.239

Pu+

2

4

He⇒

96

242

+

0

1

n

Further explanation

There are two types of nuclear reactions

Fission reaction is the splitting of an atomic nucleus by firing a particle

Example:

²³⁵₉₂U + ¹₀n -> ⁸⁹₃₆Kr + ¹⁴⁴₅₆Ba + 3¹₀n

Fusion reaction is a combination of two atomic nuclei

Example:

³₁Ti + ²₁D -> ⁴₂He + ¹₀n

There are several particles involved in atomic nuclei reactions:

alpha α particles ₂He⁴

beta β ₋₁e⁰ particles

gamma particles γ

positron particles ₁e⁰

neutron particles ₀n¹

In a nuclear reaction, it is always found that the atomic number (Z) and mass number (A) are the same either before or after the reaction

In the fusion reaction of Plutonium (Pu) and Helium (He), it can also be said to be a synthesis reaction due to the combination of two elements.

Reaction :

\tt ^{239}_{94}Pu+^4_2He\Rightarrow ^{242}_{96}+^1_0n

94

239

Pu+

2

4

He⇒

96

242

+

0

1

n

number of atomic numbers (Z) = 94+2=96+0

number of mass numbers (A) = 239+4= 242+1

4. beta decay converts a neutron into a proton to form neptunium-239 (half-life 2.36 days) and another beta decay forms plutonium-239.

5.Nobelium is created by nuclear bombardment, and has only been produced in miniscule amounts. Nobelium can be produced by irradiating a californium-249 target with carbon-12 ions. Isotopes: Nobelium has 12 isotopes whose half-lives are known, with mass numbers 250 to 262.