2024 Exam Questions and Answers
What is another name for the mass number? -
Answer>>nucleon number
What is another name for the atomic number? -
Answer>>proton number
What is an isotope? - Answer>>atom of the same element with
the same atomic number, and a different number of neutrons
How is relative atomic mass measured? - Answer>>relative to
the mass of 1/12 of a carbon-12 atom
What charge are ions in a mass spectrometer? - Answer>>+1
What unit is given by a mass spectrometer? - Answer>>m/z
(mass / charge)
What type of compound produces an M+1 peak? -
Answer>>organic compound
Why are M+1 peaks seen in mass spectrometry? -
Answer>>carbon-13 is present in small amounts
What are the first four quantum subshells, in increasing energy
levels? - Answer>>s, p, d, f
What shape are s-orbitals? - Answer>>spherical
What shape are p-orbitals? - Answer>>elongated dumbbells
, Which elements have unusual electronic configurations including
4s1 where 4s2 may be expected? - Answer>>chromium and
copper
Which shell fills up first? [3d/4s] - Answer>>4s
Which shell fills up first? [2p/3s] - Answer>>2p
How does spin-spin pairing occur? - Answer>>orbitals in a
subshell receive one electron, then two before moving onto the
next subshell
What is the equation for first ionisation energy (IE1)? -
Answer>>A(g) -> A+(g) + e-
What is the equation for second ionisation energy (IE2)? -
Answer>>A+(g) -> A2+(g) + e-
What is the definition of first ionisation energy (IE1)? -
Answer>>energy needed to remove one mole of the outermost
electrons from one mole of gaseous atoms to produce one mole
of gaseous ions with a charge of +1
An element has a large jump between IE1 and IE2. What group is
the element? - Answer>>group 1
An element has a large jump between IE3 and IE4. What group is
the element in? - Answer>>group 3
What three factors affect the energy of an electron? -
Answer>>orbital, nuclear charge, shielding
What is an s-block element? - Answer>>outermost electron is in
an s-orbital