Across
- 3. rule of atoms forming bonds to get 8 valence electrons
- 5. product of a reaction between metal and nonmetal
- 7. pure substance composed of only 2 or more elements in a fixed ratio
- 8. a negative ion that gained electrons
- 9. compound type where chemicals composed of only 2 atoms are chemically bonded
- 15. class of elements on the periodic table:poor conductors,dull
- 16. Bond made by 3 bonding pairs of electrons
- 18. a positive ion that lost electrons
- 20. Degree to which an element gains an electron to form anions
- 21. negative charge and positive charge are equal in the atom
Down
- 1. *blank* covalent bond is where electrons are shared between atoms but not equally
- 2. attraction that holds opposite charges
- 4. made by one binding pair of electrons
- 6. Amount of energy required to remove electrons from an atom
- 10. made by two bonding pairs of electrons
- 11. stable particles formed when 2 or more atoms are covalently bonded to each other
- 12. *blank* covalent bond, electrons are shared equally
- 13. unequal sharing of atoms in a covalent bond
- 14. *blank* bond atoms share some or all valence electrons
- 17. 2 electrons in the same orbital of an atom or molecule
- 19. class of elements on the periodic table :reactive, shiny, high melting point