the periodic table Flashcards
group I chemical properties
- The time taken for a freshly cut element to tarnish decreases going down the group, showing that the reactivity increases going down the group.
- They all have low densities. Some will even float on water.
- The melting points are relatively low.
- The metals react vigorously with water to produce a metal hydroxide and hydrogen gas
what are group VII elements called?
halogens
when elements from group VII react with metals, what do they produce?
a range of different salts
as elements, they exist as.. (Group VII)
diatomic molecules
chlorine is a..
yellow-green gas
bromine is a…
dark red liquid
iodine is a…
dark purple solid
group VII chemical properties
- As you go down the group, density increases
- As you go down the group, the melting point increases
- As you go down the group, reactivity decreases
halide salts
compounds formed between a metal ion and a group VII ion
displacement reaction
a reaction where a less reactive element is removed from a compound by a more reactive element
a redox reaction that involves the loss and gain of electrons
- In a displacement reaction, the more reactive metal is being oxidized, as it loses electrons and the less reactive metal is being reduced as it gains electrons
noble gases
- Group VIII elements
- Full outer shell
- Colorless gases
- Monoatomic (exist as a single atom)
- As you move down the group, the boiling point increases
- As you move down the group, the density increases
properties of metals
- Electrical conductivity: metals contain delocalized electrons that can carry a charge, making them good conductors of electricity
- Good thermal conductor
- High melting and boiling points
- Malleable and ductile
reactions of metals
- Reactions with dilute acids: salt is formed and hydrogen is emitted
- Reactions with water: metal hydroxide is formed and hydrogen gas
- Reactions with oxygen: rate of reaction depends on the reactivity of the metal
aluminium properties
- Low density
- Conducts electricity well
- Corrosion resistant
copper properties
- Pure copper which is obtained from electrolysis is a very good conductor of electricity
- Very ductile
