Basic Facts

Cards (18)

  • Define Matter?
    Matter is a physical substance that has mass.
  • What is an atom?
    Atoms are individual units of matter that make up all matter.
  • What makes up an atom?
    A densely packed nucleus of protons and neutrons surrounded by electrons
  • What are the properties of a proton?
    Proton has a charge of +1 and a relative mass of 1
  • What are the properties of a neutron?
    Neutron has a charge of nothing and a relative mass of 1
  • What are the properties of an electron?
    Electron has a charge of -1 and no relative mass
  • Why do electrons remain near nucleus?
    Due to electrostatic forces of attraction.
  • What letter represents the mass number?
    A
  • What letter represents the atomic number?
    Z
  • What letter represents the Chemical symbol?
    X
  • Is mass above atomic number in nuclear symbol?
    Yes.
  • What is an isotope?
    An atom with a different mass, different number of neutrons.
  • What is an ion?
    An atom with a different number of electrons.
  • Define Valency?
    the number of electrons in the outer shell, increasing across a period due to the increase in atomic number but constant down a group.
  • Define Molecule.
    Contains the same type of atoms, existing as individual atoms or atoms held together by chemical bonds.
  • Define Molecule.
    Two or more atoms of the same element joined together chemically.
  • Define Compound.
    Two or more atoms of different elements joined chemically.
  • What is a mixture?
    is made up of two or more substances that are not chemically bonded. The properties of a mixture depend on the identity and amount of each substances that is a component of the mixture.