URGENT The nuclear equation is incomplete what particle completes the equation.

A

Xenon 138

Explanation:

In the attached nuclear reaction, the sum of the mass number in LHS is

239 + 1 = 240

While the Atomic number = 54 + 0 = 54

The sum of the mass number in the RHS is 100 + 2(1) = 102

While the sum of the atomic number is

40 + 0 = 40

The mass number of the missing element is

240 - 102 = 138

While the Atomic number of the missing element is

94 - 40 = 54

Nuclear reaction at equilibrium, the mass number and the atomic number at LHS must be equal to RHS

The missing element is Xenon 138 with atomic number of 54

Therefore, when the Plutonium is bombarded with a neutron, the result of the reaction is the production of Zirconium 100 and Xenon 138 with the bombardment of two neutrons

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .