AO1 WJEC Basic Chemistry Quiz

What is an element?

• A substance made from different types of atoms

• A substance made from identical atoms

• A combination of atoms bonded together

• A charged particle

What is a molecule?

• A single atom

• A charged particle

• Two or more atoms bonded together

• A mixture of elements

What is a compound?

• A mixture of gases

• A single atom with a charge

• Two or more different elements chemically bonded

• Two or more atoms of the same element

What is an ion?

• A neutral atom

• A molecule with no charge

• A charged atom or molecule

• A group of elements bonded together

What does inorganic mean?

• Made only from carbon

• Not containing carbon-hydrogen bonds

• Found only in living things

• Always toxic to organisms

Which ion is a necessary component of chlorophyll?

• Sodium (Na⁺)

• Magnesium (Mg²⁺)

• Iron (Fe²⁺)

• Potassium (K⁺)

Which ion is a component of haemoglobin?

• Calcium (Ca²⁺)

• Zinc (Zn²⁺)

• Iron (Fe²⁺)

• Chloride (Cl⁻)

What is the role of calcium ions in plants?

• They help in chlorophyll formation

• They strengthen cell walls

• They aid in oxygen transport

• They provide energy for photosynthesis

What is the role of calcium ions in animals?

• Energy production

• Blood clotting and bone formation

• Digestion of proteins

• Synthesis of DNA

Name two types of molecule that contain phosphate:

• Proteins and fats

• DNA and ATP

• Glucose and starch

• Water and carbon dioxide