At room temperature, a melting solid produces a whitish liquid. A laser beam shined through the liquid is unaffected and produce
1 answer:
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Answer: Thus X is Plutonium
Explanation:
Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units and atomic number is reduced by 2 units.
General representation of alpha decay :
where Z = atomic number
A= mass number
X and Y = atomic symbol of elements
Thus
Thus X is Plutonium with atomic number 94 and mass number 239
The correct statement about subatomic particles is Electrons are the subatomic particles with the smallest mass.
The mass of protons and neutrons which are considered as 1 unit of mass of atoms is approximately 1836 times the mass of the electron
Atoms are composed of 3 types of basic particles namely protons, electrons, and neutrons
The mass of this basic particle is expressed in units of atomic mass
This atomic unit uses the standard atomic mass, that is, the C-12 isotope
1 atom C-12 = 12 atomic mass units
1 atomic mass unit = 1/12 x mass 1 C-12 atom
1 unit of atomic mass = 1.66.10⁻²⁴
the mass of each basic particle in atomic mass units is:
electron mass = 9.11.10⁻²⁸
proton mass = 1.6726.10⁻²⁴
neutron mass = 1,675.10⁻²⁴
The proton mass is considered to be equal to 1 atomic mass unit and a neutron which is also considered to be equal to 1 atomic mass unit
The charge of 1 proton is equal to a charge of 1 electron but has a different sign
The proton is positively charged (+1), the electron is negatively charged (-1). and neutrons not charged (neutral)
For a charge of 1 electron = e = 1.66.10⁻¹⁹ coulomb
Whereas the neutron charge = 0
Let's look at the answer choices
- 1. Protons are the only subatomic particles to have a charge.
This statement is wrong because in the nucleus there are electrons charged -
- 2. Electrons are the subatomic particles with the smallest mass.
The statement is true because the mass of protons and neutrons which are considered as 1 unit of mass of atoms is approximately 1836 times the mass of the electron
- 3. Neutrons orbit the nucleus of the atom.
This statement is wrong.
It can be explained by the Bohr atomic model, where electrons circulate the nucleus on a particular path so that electrons are not attracted to the nucleus.
- 4. Subatomic particles all have the same mass
This statement is wrong because the mass of protons and neutrons is the same while the electron mass is smaller
So the correct statement about subatomic particles is Electrons are the subatomic particles with the smallest mass.
The subatomic particle
the main difference between the Bohr model of the atom and the rutherford model.
The equation between Bohr and Rutherford models
the hypothesis of Thomson's atomic model
Keywords: atomic model, Bohr, atoms, protons, electrons, atomic, neutrons
