Question

1.an assembler protons and neutrons within an atom
2. mass number of an element
3. Alpha particle consist of
options

a. two protons and three neutrons
b. two protons and 1 neutrons
c. two protons and two electrons
d. two two protons and neutrons​

Answer 1

Answer:

1. nucleus

2. An alpha particle is identical to a helium atom that has been stripped of its two electrons; thus, an alpha particle contains two protons and two neutrons. Because an alpha particle has no electrons to balance the positive charge of the two protons, it has a charge of +2 and can be represented as He2+.

3.Alpha particles are composite particles consisting of two protons and two neutrons tightly bound together . They are emitted from the nucleus of some radionuclides during a form of radioactive decay, called alpha-decay.

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Answer 2

Explanation:

1st.. is Nucleus

2nd... Mass number can be identified by following

if atomic no.is even then double it and if odd then double +1, note only works for first 20 elements

Alpha particles contains 2 protons and 2neutrons

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