NAME

Question types


Start with


Question limit

of 32 available terms

Advertisement Upgrade to remove ads
Print test

5 Written questions

5 Matching questions

  1. What is the atomic mass?
  2. Difference between covalent and ionic bonds?
  3. What are trace elements?
  4. What are polar covalent bonds?
  5. What is electronegativity?
  1. a One atom's attraction of the electrons within one covalently bonded molecule
    O > N > C > H
    Oxygen - most electronegative element
  2. b The sharing of electrons UNEQUALLY; atoms have differing electronegativities
  3. c The number of protons and neutrons in nucleus.
  4. d Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
  5. e Covalent bonds are the SHARING of electrons, whether it be equally or unequally
    Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING

5 Multiple choice questions

  1. Weak.
  2. Non-polar covalent bond; they have equal electronegativity so they share their e⁻
  3. Protons - positive; in nucleus; 1 dalton (or amu)
    Neutrons - neutral; in nucleus; 1 dalton (or amu)
    Electrons - negative; found outside nucleus; 0 nothing
  4. The number of protons in an atom.
  5. A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.

5 True/False questions

  1. Define the potential energy level of electrons and the Kinetic energy level.A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.

          

  2. What is a molecule?a substance consisting of two or more different elements combined in a fixed ratio.

          

  3. What is an ion?Atoms that lose or gain electrons to complete their outer shell

          

  4. What are isotopes?Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms

          

  5. What is a hydrogen bond? Strong or weak?Two or more atoms SHARING ELECTRONS.
    Single covalent bonds - sharing of one pair of valence electrons
    Double - sharing of two pairs of valence electrons

          

Create Set