Which of the following statements best describes the role of neutrons in the nucleus?
- Which of the following statements best describes the role of neutrons in the nucleus?
- An atom is determined to be unstable. which statement best explains this finding?
- Which of the following nuclear equations correctly describes alpha emission?
- A neutral atom has 9 protons and 10 neutrons. how many electrons does this atom have?
- Which of the following is a major advantage of nuclear-fission-based power plants?
An atom is determined to be unstable. which statement best explains this finding?
The neutron is a subatomic particle with the symbol n or n0 and a mass slightly greater than that of a proton. It has a neutral charge (no positive or negative charge) and a mass slightly greater than that of a proton. Atomic nuclei are made up of protons and neutrons. Protons and neutrons are both referred to as nucleons because they behave equally inside the nucleus and each have a mass of around one atomic mass unit. [nine] Nuclear physics describes their properties and interactions.
The configuration of electrons orbiting the atom’s heavy nucleus determines much of an atom’s chemical properties. The charge of the nucleus, which is measured by the number of protons, or atomic number, determines the electron configuration. The neutron number is the total number of neutrons. The electron structure is unaffected by neutrons, but the nucleus’ mass is determined by the sum of atomic and neutron numbers.
Isotopes are chemical elements that vary only in their neutron number. Carbon, for example, has an abundant isotope carbon-12, which has 6 neutrons, and a rare isotope carbon-13, which has 7 neutrons. Fluorine, for example, is found in nature with only one stable isotope. Other elements have a lot of stable isotopes, including tin, which has ten stable isotopes.
Which of the following nuclear equations correctly describes alpha emission?
An atom is the smallest piece of an element that preserves the element’s identity. The size of individual atoms is extremely small. A 1 cm long line will need approximately fifty million atoms in a row. Several million atoms make up the time at the end of a written sentence. Since atoms are so tiny, it’s hard to believe that all matter is made up of them—but it is.
Despite the fact that the term atom comes from a Greek word that means “indivisible,” we now know that atoms are made up of smaller particles known as subatomic particles. The electron, a small subatomic particle with a negative charge, was the first component to be observed. It’s usually written as e, with a right superscript indicating the negative fee. Two larger particles were found later on. The proton, abbreviated as p+, is a more large (but still tiny) subatomic particle with a positive charge. The neutron is a subatomic particle that has a mass similar to that of a proton but no charge. It can be written as either n or n0. The atoms of all elements are now known to be made up of electrons, protons, and (with one exception) neutrons. The properties of these three subatomic particles are summarized in Table 3.1, titled “Properties of the Three Subatomic Particles.”
A neutral atom has 9 protons and 10 neutrons. how many electrons does this atom have?
The Atomic Theory of Dalton clarified a great deal about matter, molecules, and chemical reactions. Nonetheless, it was not completely true, since atoms can be broken down into smaller subunits or subatomic particles, contrary to Dalton’s belief. We’ve spent a lot of time learning about the electron, but there are two other particles that we’re interested in: protons and neutrons. We also know that J. J. Thomson found the electron, a negatively charged particle. These electrons, according to Rutherford, orbit a positive nucleus. In subsequent experiments, he discovered that the nucleus contains a smaller positively charged particle known as a proton. There is also a neutron, which is a third subatomic particle.
Atoms are made up of three kinds of particles: electrons, protons, and neutrons. Unlike protons and neutrons, which are made up of smaller, simpler particles, electrons are single-particle fundamental particles. They’re called leptons, and they’re a kind of fundamental particle. (-1) or (-2) is the electric charge of all leptons (0\). Electrons are very tiny particles. Since an electron’s mass is just around 1/2000 that of a proton or neutron, electrons add almost nothing to an atom’s total mass. The electric charge of electrons is (-1), which is the same as but opposite to the charge of a proton, which is (+1). Since all atoms have the same number of protons and electrons, the positive and negative charges balance out, leaving atoms electrically neutral.
Which of the following is a major advantage of nuclear-fission-based power plants?
Electrons or positrons are beta particles (electrons with positive electric charge, or antielectrons). In a nucleus with so many protons or neutrons, beta decay occurs when one of the protons or neutrons is converted into the other. A neutron decays into a proton, an electron, and an antineutrino in beta minus decay: n p + e – +. A proton decays into a neutron, a positron, and a neutrino in beta plus decay: p n + e+ +n. Both reactions occur because one or the other would bring the substance closer to the region of stability in different regions of the Chart of the Nuclides. These reactions occur as a result of conservation laws being followed. Electric charge conservation dictates that when an electrically neutral neutron becomes a positively charged proton, it must also contain an electrically negative particle (in this case, an electron). If a neutron (lepton number = 0) decays into a proton (lepton number = 0) and an electron (lepton number = 1), a particle with a lepton number of -1 (in this case an antineutrino) must also be formed, according to lepton number conservation. The leptons released in beta decay were not present in the nucleus prior to the decay; they were produced at the time of the decay.