Combining Atoms Flashcards
(24 cards)
Types of Primary bonding
Metallic bonding, ionic bonding, and covalent bonding
Primary bonding strength and what determines the type of bonding
Primary bonding is strong between atoms. The type of elements involved in the bonding determines the type of bonding.
What is metallic bonding?
- metals bonding with metals
- Metal LOSE electrons from their valence shell to other metal ions nearby.
What ions and structure does a metallic bonding form?
Cation forms a lattice structure.
Electrons in metallic bonding.
The valence electrons are DELOCALISED. Moving from ion to ion.
Physical properties of metal.
They are malleable and ductile. As they are deformed, there is still attraction between the ions and delocalised electrons.
In ionic bonding, which has a negative charge, which one has a positive charge?
Metal has a positive charge and the non-metal has a negative charge.
What attraction occurs in ionic bonding?
Electrostatic attraction
Does ionic solid conduct electricity?
Ionic solids don’t conduct electricity, as the ions cannot move.
Does ionic solution conduct electricity?
when dissolved in water, the ions can move and the solution CAN conduct electricity.
Does melted ionic substances conduct electricity?
Yes, the melt can conduct electricity.
Physical properties of ionic solids
They are brittle. As the force applied, the lattice results in same charged ions aligning, leading to the lattice break up.
How is the melting point of ionic substance?
Ionic substance usually have high melting points, as there is strong attraction between the ions.
Can metal conducts heat?
Yes, as the ions are close to each other, they can transfer kinetic energy easily.
How well can metals conduct electricity?
Metals conduct electricity readily as there are mobile (moving) charged particles to carry the charge. (delocalised electrons)
How is the melting point of metals?
They have high melting points because the attraction between ions is strong.
How covalent bond is formed?
When two non-metals share pairs of electrons.
What determines the bond’s properties such as melting point?
The number of bonds determines the properties of the bonding.
What form is SiO2 and diamond?
They are covalent lattice. When large numbers of non-metals bond together, they can bond to form covalent lattice (except graphite and graphene).
What form molecular substances usually is at room temperature?
Gas or Liquid
What is the difference between large molecular substances?
Large molecular substances can be solid in room temperature with low melting point.
Would calcium metal be a good conductor of heat and electricity?
Yes, because their atoms are close together, heat can be easily transferred. The delocalised electrons carry charges with them, so it is also a good conductor of electricity, moving from ion to ion.
Is silicon dioxide highly reactive? How would you know?
No, they are very strong and stable because of their full valence shell. They are large
Does silicon dioxide conduct electricity well?
No, because it doesn’t have free charge electrons.
