Artículos de esta sección

• True or false about atoms (8309)

  14 de septiembre, por F_y_Q

  Decide whether the following statements are true or false. Explain the reason if you find them false:
  a) An atom is different from an ion.
  b) Atoms have more electrons than protons.
  c) Two cations attract each other only if they are in contact.
  d) Carbon atoms can be better conductors (…)

• Calculation of the number of protons, electrons and neutrons knowing A and Z (8283)

  10 de agosto, por F_y_Q

  If Z = 47 and A = 108, how many electrons, protons, and neutrons does this element have?

• Atomic number and atomic mass (3444)

  6 de enero de 2016, por F_y_Q

  An element has an atomic number of 10 and an atomic mass of 20. How many neutrons does this element have?

• Question about nucleus of the atom (3443)

  5 de enero de 2016, por F_y_Q

  The nucleus of an atom is composed of uncharged particles as well as the following:
  a) Electrons
  b) Protons
  c) Neutrons
  d) Ions