Name the three main subatomic particles, and state their charge and location within an atom.

An atom has an atomic number of 12 and a mass number of 24. How many protons, neutrons, and electrons does it have?

Define the term "isotope" using Carbon-12 and Carbon-14 as examples.

Write the electronic configuration of a chlorine atom (Atomic Number = 17).

An element has the electronic configuration 2, 8, 5. In which Group and Period of the Periodic Table is it located?

What is the maximum number of electrons that can be held in the second electron shell (L shell)?

What is the difference between the atomic number and the mass number of an element?

Is an element with the electronic configuration 2, 8, 2 a metal or a non-metal? Explain why.

Define electronegativity. How does it generally change as you move from left to right across a period?

Why are the elements in Group VIII/0 (like Neon and Argon) very unreactive?

What is the standard notation for an atom of potassium (K) with 19 protons and 20 neutrons?

Define First Ionisation Energy.

Which element would have a lower first ionisation energy: Lithium (Li) or Potassium (K)? Explain your reasoning.

What do all atoms of the same element have in common?

An ion has 10 electrons and 13 protons. What is the element, and what is the charge on the ion?