Yahoo Web Search

Sign In

Search results

  1. Dictionary
    atom
    /ˈatəm/

    noun

    • 1. the smallest particle of a chemical element that can exist.
    • 2. a level of amateur sport, typically involving children aged between nine and eleven: Canadian "eight atom hockey teams"

    Powered by Oxford Dictionaries

    More definitions, origin and scrabble points

  2. socratic.org › questions › what-is-an-atom-element-moleculeWhat is an atom, element, molecule, and compound? What is an ......

    Mar 29, 2017 · An element is a substance that is made entirely of one type of atom. For example, the element sodium is made up of only sodium atoms. A molecule is a substance that contains two or more atoms chemically joined, such as H 2,O2. A compound is a substance that is made up of two or more different elements that are chemically joined, such as H 2O,CO ...

  3. socratic.org › chemistry › a-first-introduction-to-matterElements - Chemistry - Socratic

    An element is the simplest type of substance: one that is made up of identical atoms, such as hydrogen. Once a different type of atom is combined with the atoms in an element, a compound is created; like when oxygen is combined with hydrogen and water is formed. However, if the atoms themselves don’t bond but two different substances exist together, we can call them a mixture, such as water ...

  4. socratic.org › chemistry › a-first-introduction-to-matterMass Number - Chemistry - Socratic

    Answer: Well, the mass number of an atom is simply the number of massive, nuclear particles, protons, and neutrons.... And so for 1H, the mass number is simply 1; for 2H, the mass number is simply 2; for 3H, the mass number is simply 3. The isotopes contain 0, 1, 2 NEUTRONS respectively. Most of the heavier atoms have a range of isotopes, and ...

  5. socratic.org › chemistry › a-first-introduction-to-matterAtomic Number - Chemistry - Socratic

    The number of protons in an atom is known as the Atomic Number, which is how the periodic table is organized (they are listed in order of atomic number from left to right). The Mass Number describes the total number of protons and neutrons in the nucleus. An atom in its typical state will not have a charge, as the positive particles (protons) balanced out the negative ones (electrons). However ...

  6. socratic.org › questions › how-would-you-compare-and-contrastHow would you compare and contrast atoms, ions, and isotopes?

    Nov 29, 2015 · Answer link. Atoms, ions and isotopes are very closely related. An atom is the smallest uncharged unit of a substance. This means a substance is made up of only that very type of particle throughout. For example, air is a mixture of gases. It contains atoms, or strictly speaking, molecules, of various gases, mostly nitrogen and oxygen with ...

  7. socratic.org › chemistry › a-first-introduction-to-matterAtomic Mass - Chemistry - Socratic

    The mass of an atom is refereed as its atomic mass. Measured in:- amu or atomic mass unit. Commonly the atomic mass is calculated by adding the number of protons and neutrons together whereas electrons are ignored. Expressed in:- grams or any other units to measure weight. Standard:- 1/12th of mass of a C-12 isotope.

  8. socratic.org › questions › what-are-the-names-charges-andWhat are the names, charges, and locations of the three ... -...

    Nov 13, 2015 · Proton (charge of +e, in the nucleus), Neutron (0 charge, in the nucleus), and Electron (charge of –e, outside the nucleus). 1. Proton. This is a positively charged particle that is present in the nucleus of atoms. It has a charge of + 1.6 × 10^(-19) C. But for ease we might say it has a charge of +e or +1. Neutron. This particle has a charge of zero; it is uncharged/neutral. It is present ...

  9. socratic.org › organic-chemistry-1 › r-and-s-configurationsIntroduction to Chirality and Chiral Centers - Socratic

    A chiral centre is an atom that has four different groups bonded to it in such a manner that it has a nonsuperimposable mirror image. The term "chiral centre" has been replaced by the term chirality centre. In the molecule below, the carbon atom is a chirality centre. It has four different groups attached, and the two structures are ...

  10. socratic.org › chemistry › the-periodic-tableValence Electrons - Chemistry - Socratic

    Valence electrons are the electrons present in the outermost shell of an atom. You can easily determine the number of valence electrons an atom can have by looking at its Group in the periodic table. For example, atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively. Atoms in Groups 13 and 18 have 3 and 8 valence electrons ...

  11. socratic.org › questions › what-are-the-parts-of-an-atom-whatWhat are the parts of an atom? What does each do ... - Socratic

    Sep 16, 2017 · Atom is made up of 4 parts, nucleus, protons, electrons and neutrons. - Protons are positively charged particles and they determine what element the atom is Neutrons mainly stabilize the atom and have the same atomic mass as protons,also located near the proton Electrons, that is in the most outer part of an atom allow the atoms to bond to each other and take part in chemical reactions The ...