Column 1
Which metal is more reactive, zinc or iron?
zinc
Define the term ion
An ion is a charged particle.
A solution with pH 4.3. Is it acidic or alkaline solution?
Acidic solution
a substance that indicates whether something is an acid or an alkali.
The positive ions are called ........................
cations.
What does corrosive mean?
It eats away any substance it comes into contact with
An element has 14 protons. Which group is it in?
Group 4
Why are noble gases unreactive?
Because they have a full outer shell of electrons.
Adding methyl orange to an alkaline solution will change its colour to.........
Red
True or False:
In an exothermic reaction, the products have more energy than the reactants.
False.
Gold
Name H2SO4
Sulfuric acid
What do metals react with in the air?
Oxygen
Give two reasons why copper is used for water pipes in homes
malleable, non - toxic, does not readily corrode.
Solution A has a higher concentration of H+ ions than solution B does. Which has a higher pH, A or B?
B
Give two examples of alkalis
Calcium hydroxide
Sodium hydroxide
Potassium hydroxide
Complete the reaction:
Copper + Water ->
No reaction
An alloy contains 95% copper and 5% tin.
What is the name of this alloy
Bronze
Why do atoms form bonds?
to obtain a full outer shell of electrons.
What are the products when a metal reacts with dilute hydrochloric acid?