Chemistry Revision Questions Flashcards
(23 cards)
What is the relative mass of a proton?
+1
What is the relative charge of an electron?
-1
What is the relative mass of an electron?
1/2000
How many protons are in a carbon atom?
6
How many electrons are in a carbon atom?
6
How many neutrons are in a carbon atom?
6
What is the electronic structure of a carbon atom?
2,4
Fill in the blank: A proton has a _______ charge.
+1
Fill in the blank: A neutron has a _______ charge.
0
Fill in the blank: An electron has a _______ charge.
-1
Define the term element
A substance made of only one type of atom.
Elements are the fundamental building blocks of matter.
Define the term mixture
A substance made of 2 or more substances NOT bonded together.
Mixtures can be separated by physical means.
What is a compound?
A substance made of 2 or more elements chemically bonded.
Compounds have unique chemical properties different from the individual elements.
How does increasing temperature affect the rate of a chemical reaction?
Increased temperature results in particles having more kinetic energy, leading to more successful collisions.
Higher energy increases the likelihood of reactions occurring.
What is the effect of temperature on particle movement?
Particles move more vigorously at higher temperatures.
This increased movement can lead to changes in states of matter such as evaporation and melting.
Complete the word equation: Magnesium + oxygen → _____
Magnesium oxide.
This represents the reaction between magnesium and oxygen to form magnesium oxide.
What are the reactants in the equation Magnesium + oxygen?
Magnesium and oxygen.
Reactants are the starting substances in a chemical reaction.
What are the products in the equation Magnesium + oxygen → Magnesium oxide?
Magnesium oxide.
Products are the substances formed as a result of a chemical reaction.
What happens during evaporation?
Liquid turns into gas.
Evaporation occurs when particles gain enough energy to escape the liquid state.
Draw a particle diagram to represent H2O.
A diagram showing two hydrogen atoms bonded to one oxygen atom.
This representation illustrates the molecular structure of water.
Fill in the blank: The process of changing from liquid to solid is called _______.
freezing.
Freezing occurs when the temperature of a liquid drops below its freezing point.
Fill in the blank: The process of turning from solid to liquid is called _______.
melting.
Melting occurs when a solid gains enough heat energy to change state.
What is the role of kinetic energy in particle collisions?
Kinetic energy determines the speed and energy of particles during collisions.
Higher kinetic energy increases the chance of effective collisions leading to reactions.
