C8.2 Flashcards
What are the general properties of Group I alkali metals?
Relatively soft metals with trends of decreasing melting point, increasing density, and increasing reactivity with water.
What is the trend in melting points for Group I alkali metals down the group?
Decreasing melting point.
What happens to the density of Group I alkali metals as you move down the group?
Increasing density.
How does reactivity with water change in Group I alkali metals down the group?
Increasing reactivity with water.
Describe the Group VII halogens.
Diatomic non-metals with trends of increasing density and decreasing reactivity.
What is the appearance of chlorine at room temperature and pressure?
A pale yellow-green gas.
What is the appearance of bromine at room temperature and pressure?
A red-brown liquid.
What is the appearance of iodine at room temperature and pressure?
A grey-black solid.
What are the characteristics of transition elements?
Metals with high densities, high melting points, form coloured compounds, and often act as catalysts.
What is a key property of transition elements regarding their melting points?
High melting points.
Do transition elements generally form coloured compounds?
Yes.
What role do transition elements often play in chemical reactions?
Act as catalysts.
Fill in the blank: The reactivity of halogens down Group VII is ______.
Decreasing reactivity.
Describe the displacement reactions of halogens with other halide ions.
Involve halogens displacing less reactive halide ions.
Eg. chlorine displaces bromine
Why are noble gases monoatomic and unreactive
Noble gases have a full outer shell so it does not need to gain or lose electrons in a reaction so it does not react
