A-Level Chemistry Transition Lesson: Chemical Terminology and Formulas Quiz

What is the definition of a molecule?

• Any collection of atoms
• Atoms chemically bonded together through covalent bonds
• A single atom in isolation
• Ionic compounds

What is the difference between molecular formula and empirical formula?

• They are exactly the same
• Molecular formula shows actual number of atoms, empirical formula shows simplest whole number ratio
• Empirical formula is always larger
• Molecular formula only applies to organic compounds

In the periodic table, which group of elements will form +1 ions?

• Group 2
• Group 7
• Group 1
• Group 6

What charge will elements in Group 6 typically form?

• +1
• -1
• +2
• -2

What is the charge of a sulfate ion?

• +2
• -2
• +1
• -1

How many electrons will an aluminium atom typically lose when forming an ion?

• 1
• 2
• 3
• 4

What is the chemical formula for magnesium chloride?

• MgCl
• MgCl2
• Mg2Cl
• MgCl3

Which of these ions was NOT mentioned in the video as one of the nine key ions to know?

• Hydroxide
• Carbonate
• Phosphate
• Chloride

What does the term 'particle' represent in chemistry?

• A specific type of atom
• A precise scientific measurement
• A very vague term that can refer to atoms, molecules, ions, or electrons
• A type of chemical bond

What charge will silver ions typically have?

• +1
• -1
• +2
• 0