C4.1 - Predicting Chemical Reactions Flashcards
What is the trend in density down Group 1?
Increasing
What is the trend in melting point down Group 1?
Decreasing
What is the trend in reactivity down Group 1?
Increasing
Why does reactivity increase down Group 1?
There is more shielding from the increased number of electron shells,
So atomic radius increases,
So the nuclear attraction between the nucleus and the outer shell electron is weaker,
So it is easier to lose an electron
Why are Group 1 elements called alkali metals?
When they react with water, the form a metal hydroxide and hydrogen
What is the trend in density down Group 7?
Increasing
What is the trend in melting and boiling points down Group 7?
Increasing
What is the trend in reactivity down Group 7?
Decreasing
Why does reactivity decrease down Group 7?
There is more shielding from the increased number of electron shells,
So atomic radius increases,
So the nuclear attraction is weaker,
So it is harder to gain an electron
How do noble gases exist?
Monatomic, meaning they exist as single atoms with weak forces of attraction between them
What is the trend in density down Group 0?
Increasing
What is the trend in melting and boiling points down Group 0?
Increasing
What is the trend in attractive forces between atoms down Group 0?
Stronger
Why are the noble gases unreactive?
They have complete outer shells, so they have no tendency to lose or gain electrons, or to share them in reactions
How do transition metals compare to alkali metals in:
Strength
Hardness
Density
Melting points
Reactivity
Stronger
Harder
Denser
Higher melting points
Less reactive
