chemistry Flashcards
Each element in the periodic table has an atomic number.
Select which one of the following statements describes the atomic number.
The number of protons in the atom
Group 1 of the Periodic Table includes elements such as sodium and potassium.
Read the four statements and select the one that is true.
Group 1 elements become more reactive going down the group
State which one of the following compounds is an example of ionic bonding.
Methane (CH₄)
Read the four statements about the arrangement of particles in a solid, liquid and gas.
Select the statement that is true.
The container determines the shape and volume of a liquid, as the particles are free to move
Hydrochloric acid will react with sodium hydroxide to produce water and a salt.
What is the name of the salt formed?
Potassium chloride
These four metals all appear in the reactivity series.
Which of these shows them in the correct order, from most reactive to least reactive?
Potassium, lithium, zinc, copper
Hydrochloric acid reacts with magnesium.
State the gas formed in the reaction.
Carbon dioxide
select the correct description of an exothermic reaction.
A reaction in which energy is transferred to the surroundings
Combustion is an exothermic reaction.
Select which two of these statements are true
An exothermic reaction is one that transfers energy to the surroundings.
The products of a combustion reaction have more energy than the reactants did
Which one of these changes will increase the rate of a chemical reaction? paper 2
Increasing the concentration of the reactants
A catalyst is used to alter the rate of a reaction without being used up itself.
Select which one of these statements is true. paper 2
Using a catalyst reduces the activation energy required for the reaction to occur
Methane has a formula of CH₄ and ethane has a formula of C₂H₆
The next alkane in the series is propane.
Which of these is the correct formula for propane? paper 2
C₃H₈
Which of these is a test for oxygen gas? paper 2
The gas will relight a glowing splint
Select which one of the following is true about the complete combustion of a hydrocarbon. paper 2
Carbon dioxide and water are the products
