2 1-10.   When compared to an electron tube, the semiconductor device has which of the following limitations? 1.    The semiconductor is more sensitive to temperature 2.    The semiconductor is used only in radar equipment 3.    The semiconductor is difficult to adapt to commercial products 4.    Each of the above 1-11.   Matter can be found in which of the following forms? 1.    Solid 2.    Liquid 3.    Gas 4.    Each of the above 1-12.   A substance that cannot be reduced to a simpler form by chemical means is called a/an 1.    element 2.    mixture 3.    compound 4.    solution 1-13.   An atom is the smallest possible particle that retains the characteristics of which of the following substances? 1.    An element 2.    A mixture 3.    A compound 4.    A solution 1-14.   A molecule is the smallest possible particle that retains the characteristics of which of the following substances? 1.    An element 2.    A mixture 3.    A compound 4.    A solution 1-15.   Which part of the atom has a negative charge and a small mass? 1.    Proton 2.    Electron 3.    Positron 4.    Neutron 1-16.   Which part of the atom has a positive charge and a large mass? 1.    Proton 2.    Electron 3.    Positron 4.    Neutron 1-17.   Which part of the atom has no electrical charge? 1.    Proton 2.    Electron 3.    Positron 4.    Neutron 1-18.   What name is given to the outermost shell of an atom? 1.    First shell 2.    M shell 3.    Valence shell 4.    Subshell 1-19.   What term is used to describe an atom which has more than its normal amount of electrons? 1.    Ion 2.    Ionization 3.    Positive ion 4.    Negative ion 1-20.   Which of the following terms is defined as the process by which an atom gains or loses electrons? 1.    Quanta 2.    Ionization 3.    Loss of energy 4.    Remaining energy