Chemistry, 02.10.2019 03:30 seanisom7

Which statement about subatomic particles is true?

protons are the only subatomic particles to have charge.
electrons are the subatomic particles with the smallest mass.
neutrons orbit the nucleus of the atom.
subatomic particles all have the same mass

Answers: 2

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Answer from: holasoykawaii10

The statement that is true about the subatomic particle is

$\boxed{{\text{Electrons are the subatomic particles with the smallest mass}}}$

Further explanation:

Atom is the building unit of matter and is the smallest particle that an element can possess. The central part of an atom is called atomic nucleus. There are three subatomic particles, namely protons, electrons and neutrons in an atom. Out of these three, protons and neutrons reside in the nucleus of the atom while electrons revolve around the atomic nucleus in definite orbits.

Proton is the subatomic particle that carries a positive charge, electrons are negatively charged and neutrons are neutral with no charge on them.

Protons are the only subatomic particles to have charge.

Only neutrons have no charge whereas both protons and electrons are charged subatomic particles. Therefore this statement is false.

Electrons are the subatomic particles with the smallest mass.

The mass of an electron is $9.1 \times {10^{ - 31}}{\text{ kga}}$ , that of protons is $1.6726219 \times {10^{ - 27}}{\text{ kg}}$ and that of neutrons is $1.674927471 \times {10^{ - 27}}{\text{ kg}}$ . So the mass of electrons is the smallest among all the subatomic particles. Therefore this statement is true.

Neutrons orbit the nucleus of the atom.

Neutrons and protons are located inside the nucleus of an atom while electrons revolve around it in definite orbits. Therefore this statement is false.

Subatomic particles all have the same mass.

The mass of an electron is $9.1 \times {10^{ - 31}}{\text{ kg}}$ , that of protons is $1.6726219 \times {10^{ - 27}}{\text{ kg}}$ and that of neutrons is $1.674927471 \times {10^{ - 27}}{\text{ kg}}$ . The mass of protons and neutrons is almost same but that of electrons is quite different from masses of the other two particles. Therefore this statement is false.

Learn more:

Component of John Dalton’s atomic theory: link Basis of investigation for the scientists: link

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: atom, matter, atomic nucleus, proton, electron, neutron, mass, positive charge, subatomic particle, smallest mass.

Answer from: Quest

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied

Answer from: Quest

Answer is: hydrogen is being oxidized.chemical reaction: co₂ + h₂ → co + h₂o.oxidation half reaction: h₂ → 2h⁺ + 2e⁻.reduction half reaction: c⁺⁴ + 2e⁻ → c⁺².oxidation is increase of oxidation number, hydrogen change oxidation number from neutral charge (in molecule of hydrogen) to oxidation number +1 (in water).