History of the Atom
Which particle in an atom has a neutral charge?
Neutron
What type of bonding is found between a metal and non-metal?
What type of bonding is found in diamond?
covalent bonding
Why are the transition metals called "transition metals"?
Because they can lose a different number of electrons
What 2 subatomic particles are found in the nucleus of an atom?
proton and neutron
What type of bonding is described as "sea of electrons"
metallic bonding
What shape do the carbon atoms form in graphite?
hexagon (6 sides - called "hexa"
- good conductor of electricity
- hard and strong
- high melting point
- high density
How do we organize the periodic table?
We organize it using "atomic number" or "proton number"
Why does diamond have a high melting point?
How many electrons does F- have?
10 electrons
How many electrons do Group 2 elements lose?
2 electrons lost
Why can graphite (made of Carbon atoms) conduct electricity?
Each carbon has an outer electron which is delocalized, behave similar to metallic bonding (movement of electron - sea of electron)
Draw the electronic structure of sodium on the board:
Na in middle, 3 rings around it: 2 electrons, 8 electrons, 1 electron
Why do Group 7 elements always gain 1 electron?
to have full outer shell
What other giant covalent structure looks exactly the same as diamond?
silicon dioxide
or, also called silica
or also SiO2