Agnosticism is the view or belief that the existence of God, the divine, or the supernatural is either unknowable in principle or currently unknown in fact. It can also mean an apathy towards such religious belief and refer to personal limitations rather than a worldview. Another definition is the view that "human reason is incapable of providing sufficient rational grounds to justify either the belief that God exists or the belief that God does not exist."
In quantum mechanics, an atomic orbital is a function describing the location and wave-like behavior of an electron in an atom. This function describes the electron's charge distribution around the atom's nucleus, and can be used to calculate the probability of finding an electron in a specific region around the nucleus.
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom, presented by Niels Bohr and Ernest Rutherford in 1913. It consists of a small, dense nucleus surrounded by orbiting electrons. It is analogous to the structure of the Solar System, but with attraction provided by electrostatic force rather than gravity, and with the electron energies quantized.
Secular humanism is a philosophy, belief system, or life stance that embraces human reason, logic, secular ethics, and philosophical naturalism, while specifically rejecting religious dogma, supernaturalism, and superstition as the basis of morality and decision-making.
The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields, such as computational chemistry and atomic spectroscopy. They were originally suggested and named by the physicist Douglas Hartree. Atomic units are often abbreviated "a.u." or "au", not to be confused with similar abbreviations used for astronomical units, arbitrary units, and absorbance units in other contexts.
Irreligion is the absence or rejection of religious beliefs or practices. It encompasses a wide range of viewpoints drawn from various philosophical and intellectual perspectives, including atheism, agnosticism, skepticism, rationalism, and secularism. These perspectives can vary, with individuals who identify as irreligious holding a diverse array of specific beliefs about religion or its role in their lives.
State atheism or atheist state is the incorporation of hard atheism or non-theism into political regimes. It is considered the opposite of theocracy and may also refer to large-scale secularization attempts by governments. To some extent, it is a religion-state relationship that is usually ideologically linked to irreligion and the promotion of irreligion or atheism. State atheism may refer to a government's promotion of anti-clericalism, which opposes religious institutional power and influence in all aspects of public and political life, including the involvement of religion in the everyday life of the citizen. In some instances, religious symbols and public practices that were once held by religions were replaced with secularized versions of them. State atheism in these cases is considered as not being politically neutral toward religion, and therefore it is often considered non-secular.
Jewish atheism refers to the atheism of people who are ethnically and culturally Jewish.
In quantum mechanics, angular momentum coupling is the procedure of constructing eigenstates of total angular momentum out of eigenstates of separate angular momenta. For instance, the orbit and spin of a single particle can interact through spin–orbit interaction, in which case the complete physical picture must include spin–orbit coupling. Or two charged particles, each with a well-defined angular momentum, may interact by Coulomb forces, in which case coupling of the two one-particle angular momenta to a total angular momentum is a useful step in the solution of the two-particle Schrödinger equation. In both cases the separate angular momenta are no longer constants of motion, but the sum of the two angular momenta usually still is. Angular momentum coupling in atoms is of importance in atomic spectroscopy. Angular momentum coupling of electron spins is of importance in quantum chemistry. Also in the nuclear shell model angular momentum coupling is ubiquitous.
Atheism is the rejection of an assertion that a deity exists. In a narrower sense, hard atheism is specifically the position that there are no deities, effectively taking the stance of a positive claim in regards to the existence of any goddess or god. The English term 'atheist' was used at least as early as the sixteenth century and atheistic ideas and their influence have a longer history.
The Rutherford model was devised by Ernest Rutherford to describe an atom. Rutherford directed the Geiger–Marsden experiment in 1909, which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson's plum pudding model of the atom was incorrect. Rutherford's new model for the atom, based on the experimental results, contained new features of a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume containing most of the atom's mass; this region would be known as the atomic nucleus. The Rutherford model was subsequently superseded by the Bohr model.
Criticism of atheism is criticism of the concepts, validity, or impact of atheism, including associated political and social implications. Criticisms include positions based on the history of science, philosophical and logical criticisms, findings in both the natural and social sciences, theistic apologetic arguments, arguments pertaining to ethics and morality, the effects of atheism on the individual, or the assumptions that underpin atheism.
Some movements or sects within traditionally monotheistic or polytheistic religions recognize that it is possible to practice religious faith, spirituality and adherence to tenets without a belief in deities. People with what would be considered religious or spiritual belief in a supernatural controlling power are defined by some as adherents to a religion; the argument that atheism is a religion has been described as a contradiction in terms.
A is the first letter of the Latin and English alphabet.
The Trouble with Atheism is an hour-long documentary on atheism, presented by Rod Liddle. It was broadcast on Channel 4 in Britain in December 2006. The documentary focuses on criticising atheism for its perceived similarities to religion, as well as arrogance and intolerance. The programme includes interviews with a number of prominent scientists, including atheists Richard Dawkins and Peter Atkins and Anglican priest John Polkinghorne. It also includes an interview with Ellen Johnson, the president of American Atheists.
The following outline is provided as an overview of and topical guide to atheism:
Christian atheism is an ideology that embraces the teachings, narratives, symbols, practices, or communities associated with Christianity without accepting the literal existence of God.
The Out Campaign is a public awareness initiative for freethought and atheism in the US. It was initiated by Robin Elisabeth Cornwell, and is endorsed by Richard Dawkins, a prominent atheist. The campaign aims to create more openness about being an atheist by providing a means by which atheists can identify themselves to others by displaying the movement's scarlet letterA, a scarlet colored capital "A" in the Zapfino typeface, and an allusion to the scarlet letter A worn by Hester Prynne after being convicted of adultery in Nathaniel Hawthorne's The Scarlet Letter. It encourages those who wish to be part of the campaign to come out and re-appropriate, in a humorous way, the social stigma that in some places persists against atheism, by branding themselves with a scarlet letter.
Atheism, in the broadest sense, is an absence of belief in the existence of deities. Less broadly, atheism is a rejection of the belief that any deities exist. In an even narrower sense, atheism is specifically the position that there are no deities. Atheism is contrasted with theism, which in its most general form is the belief that at least one deity exists.
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. After the discovery of the neutron in 1932, models for a nucleus composed of protons and neutrons were quickly developed by Dmitri Ivanenko and Werner Heisenberg. An atom is composed of a positively charged nucleus, with a cloud of negatively charged electrons surrounding it, bound together by electrostatic force. Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud. Protons and neutrons are bound together to form a nucleus by the nuclear force.
