Study

Discovering The Atom

  •   0%
  •  0     0     0

  • What is an example of matter that can be a solid, liquid, and gas?
    water
  • How many electrons does this element have? (charge=0)
    73
  • What is the atomic number of this element?
    73
  • What is an atom?
    An atom is the smallest unit of matter.
  • Element "H" stands for...
    Hydrogen
  • What type of molecule has a positive charge?
    proton
  • Who believed matter was made up of water, earth, fire, and air?
    aristotle
  • How many protons does this element have?
    73
  • Element "Na" stands for
    Sodium
  • Element "N" stands for...
    Nitrogen
  • How many electrons does this element have? (charge = -10)
    92
  • How protons does this element have?
    82
  • What is matter?
    A physical substance that has mass or takes up space.
  • What type of charge does a neutron have?
    no charge
  • How many neutrons does this element have?
    108
  • What are the 3 types of matter?
    solid, liquid, and gas
  • How many neutrons does this element have?
    125
  • Why are electrons outside of the nucleus?
    Electrons are outside the nucleus and orbit about it because they are attracted to the positive charge in the nucleus.
  • Who believed atoms cannot be divided, created, or destroyed.
    Democritus and Dalton
  • Element "Ca" stands for...
    Calcium
  • What is the atomic mass of this element?
    207
  • What molecules are inside of the nucleus of an atom?
    neutron and protons