Groups Flashcards
What elements are found in group 7
Halogens
What elements are found in group 0
Noble gases
What elements are found in group1
Alkali metals
Flourine + hydrogen
Hydrogen fluoride + hydrogen
What is it called when a halogen replaces another
Displacement
Sodium + water
Sodium hydroxide + hydrogen
Why are group1 metals alkali
The alkali metals are so named because when they react with water they form alkalies. Alkalies are hydroxide compounds of these elements, such as sodium hydroxide and potassium hydroxide.
How do you test for oxygen?
You put a glowing splint into a test tube. Since there’s oxygen in the tube, it should relight
What does bromine look like?
Brown liquid
Iodine is a halogen, what is the formula of iodine
I2
What happens to the boiling points and melting point as you go down group 7?
They increase
What kind of solution is formed by the product of the reaction between hydrogen and bromine
An acidic solution is formed, as the product of the reaction is hydrogen bromide, which forms hydrobromic acid in solution.
When Chlorine is passed over damp litmus paper, what happens
The litmus paper turns red then white
Why are alkali metals stored in oil
They’re incredibly reactive and will react with the oxygen in the air and the moisture otherwise
How does the melting point of the alkali metals change as you go down
They decrease
What is the equation for the reaction that takes place when an alkali metal reacts with water
2k + 2H20 —> 2KOH + H2
Describe what you see when lithium reacts with water
Bubbles fiercely on the surface and moves around a bit
Describe what you see when Sodium reacts with water
Melts into a ball and fizzes around the surface
Describe what you see when potassium reacts with water
Bursts into a lilac flame and moves around the surface of the water quickly
