Separate Chemistry - C2 Bonding, Structure and Properties of Matter Flashcards
What type of bond exists between metals and non-metals in a compound?
Ionic Bond
What type of bond exists in non-metal elements and compounds?
Covalent Bond
What type of bonding exists in metallic elements and alloys?
Metallic bonding
What is the name for the electrons that are free to flow in metallic bonding?
Delocalised electrons
What is the name for the forces that exist between ions in an ionic bond?
Electrostatic forces
Q. In which type of bond are electrons shared?
Q. In which type of bond are electrons transferred?
- Covalent bond (electrons shared)
- Ionic bond (electrons transferred)
When atoms gain or lose electrons to become ions, they will have the electron structure of what group of elements?
Noble gases
Q. What charge do metal ions have?
Q What charge do non-metal ions (except Hydrogen) have?
- Metal ions are positive
- Non-metal ions are negative
Describe how sodium and chlorine bond to form sodium chloride.
*this is just an example, you should be able to do this for any metal and non-metal.
- The sodium atom loses one electron to become a sodium ion
- The chlorine atom gains one electron to become a chloride ion
- The positive sodium ion is attracted to the negative chloride ion to form sodium chloride.
Draw dot and cross diagrams for the atoms and ions of the following elements:
a) Magnesium
b) Fluorine
*this is just an example, you should be able to do this for any element in Groups 1, 2, 6 & 7.
What charge do the ions of elements in the following groups have?
a) Group 1
b) Group 2
c) Group 6
d) Group 7
a) Group 1: +
b) Group 2: 2+
c) Group 6: 2-
d) Group 7: -
Describe the structure and bonding of an ionic compound.
- Ionic bonding
- Giant structure of ions
- Lattice structure
- Oppositely charged ions held together by electrostatic forces acting in all directions
What type of bonding is represented by the diagrams below?
Ionic bonding
What are the limitations of the following diagrams to represent ionic structures?
- Dot and Cross
- Ball and Stick
- Dot and cross: Doesn’t show the structure of the ionic compound, the size or arrangement of ions.
- Ball and stick: Suggests gap between ions which aren’t in fact there.
Use the diagram to work out the empirical formula of the sodium chloride.
*this is just an example, you should be able to do this when given a diagram of any ionic compound.
By looking at the ratio of ions in the compound:
• Ratio of ions in compound 1:1
Or, to calculate using charges on ions
- Charge on sodium ion +
- Charge on chloride ion –
Answer: Formula of sodium chloride: NaCl
Small molecules contain what type of bonds?
Covalent bonds
What type of bonds exist in large molecules, such as polymers?
Covalent bonds
Give three examples of giant covalent structures.
- Diamond
- Graphite
- Silicon dioxide
What type of bonding is represented by the following diagrams?
Covalent bonding
What do the lines in the following molecule represent?
Single covalent bonds
Draw dot and cross diagrams for the following molecules:
a) Hydrogen chloride
b) Methane
*these are examples, you should be able to also do this for nitrogen, hydrogen, chlorine, oxygen, water and ammonia
What type of molecule is represented below?
Polymer