4 Metals Flashcards
What are the properties of metals?
- relatively high boiling points
- good conductors of electricity
- good conductors of heat
- high densities
What are the characteristic properties of metals?
- Hi boiling points
- Good conductors of electricity in solid and liquid state
- Malleable and ductile
- high-density
- Good conductors of heat
- Lustrous appearance
- Low electronegativity
- Low ionisation energy
- React by losing electrons
What are the main differences between main group and transition metals?
- Transition metals are harder
- Transition metals are more dense
- Transition metals have higher melting points
- Some transition metals have strong magnetic properties
- Transition metal compounds tend to be brightly coloured
What is metallic bonding?
Electrostatic force of attraction between a lattice of positive ions and delocalised valence electrons. The lattice of cations is surrounded by a ‘sea’ of delocalised electrons.
What is the metallic bonding model useful for?
Can be useful to explain the properties of metals, including their malleability, thermal conductivity generally high melting point and electrical conductivity
What are some properties of group 1 metals?
They are extremely reactive with water
By reacting metals with acids, what
Can we do?
Can be used to place metals in order of reactivity, which is called the reactivity series
Where are the most reactive metals found in the periodic table?
The bottom left hand side
What are alloys?
Mixtures of metallic elements with other elements. Alloys modify the properties of elements to make them more useful.
Alloys are often harder and melt at lower temperatures than pure metals .
What are different forms of metallic nano particles
Include nanoparticles, nanorods, and nanowires.
These have applications in medical pharmaceutical, electronic environmental an engineering sectors
What does heat treatment do two metals?
Change is the size and arrangement of crystals in metals
What does the term annealing mean?
The heating and the allowing of a metal to slowly cool to release internal stresses
What do ionic compounds form?
A crystal lattice made up of positive and negative ions
Define ionic bonding
The 3-D lattice is hell together, strongly by electrostatic forces of attraction between the cation and anion’s the electrostatic forces of attraction, I called ionic bonding
What are the characteristics of ionic compounds?
- High melting point and boiling points, but solid at room temperature
- Hard but brittle
- Neither malleable or ductile
- do not conduct, electricity as a solid
- good conductors of electricity in liquid state or as a solute
- Very from soluble to insoluble
Why are ionic compounds hard and have high, melting point and boiling points?
Because of the strong forces of attraction between positively and negatively charged ions in the crystal lattice. If the like charges lineup, repulsion will cause the solid to crack or shatter.
Why are ionic compounds useful?
Because of the physical properties, such as hardness and high melting point
What do the electron configurations of ionic compounds look like?
Ions in ionic compounds, have stable, electron configurations, identical to that of noble gases.
What are the rules when writing ionic compound formula?
- Ions that contain two or more atoms of different elements, I called polyatomic ions
- If a chemical formula contains more than one polyatomic ion, the formula of the iron is placed in brackets with a number of irons, written as subscript after the brackets
What rule applies when naming ionic compounds
- The name of the metal iron is the same as the name of the metal
- Simple non-metal irons, take the name of the atom, but and then ide
- Polyatomic, anion’s containing oxygen, usually and in ite or ate
- For metals that form ions with different charges. The charge on the iron is shown by placing a Roman numeral after the name of the metal.
