Question 1
Electron configurations for atoms of different elements are shown below.
Which electron configuration represents the element with the largest first ionisation energy?
1s22s22p63s2
1s22s22p63s23p4
1s22s22p63s23p6
1s22s22p63s23p64s2
0%
DP IB Chemistry: SL
Topic Questions
3.1 The Periodic Table & Periodic Trends
Question 2
The second ionisation energy of magnesium is 1451 kJ mol-1.
Which equation correctly represents this statement?
Mg+(g) → Mg2+(g) + e- ΔHӨ = -1451 kJ mol-1
Mg+(g) → Mg2+(g) + e- ΔHӨ = +1451 kJ mol-1
Mg(g) → Mg2+(g) + 2e- ΔHӨ = +1451 kJ mol-1
Mg(g) → Mg+(g) + e- ΔHӨ = -1451 kJ mol-1
Question 3
A periodic table is need for this question
X, Y and Z are consecutive elements in the third Period of the Periodic Table. Element Y has the highest first ionisation energy and also the lowest melting point of these three elements.
What could be the identities of X, Y and Z?
silicon, phosphorus, sulfur
sodium, magnesium, aluminium
aluminium, silicon, phosphorus
magnesium, aluminium, silicon
Question 4
An element in the d block of the periodic table forms a +4 ion and has the electron configuration of [Ar] 3d1.
What is the identity of the element?
Chromium
Copper
Vanadium
Silicon
Question 5
A periodic table is needed to answer this question
Which graph correctly shows the relative melting points of period 3 elements plotted against their relative electronegativities?
Question 6
For the following pairs, which has the greatest difference in size?
Li and Cl
Na and Br
Li+ and Br-
Na+ and Cl-
Question 7
A periodic table is needed for this question.
Elements X and Y are Period 3 elements that react together to form compound Z. Element X has the second smallest atomic radius in Period 3. Apart from argon, there is only one element in Period 3 which has a lower melting point than element Y.
Which compound could be Z?
Na2S
MgS
MgCl 2
PCl 3
Question 8
Which of these elements would form the largest ion with a noble gas electron configuration?
Gallium
Bromine
Arsenic
Rubidium
Question 9
Use a periodic table to deduce the correct information about the element tin, Sn (Z = 50)
| Number of occupied main energy levels |
Number of electrons in the highest main energy level |
|
|
A |
4 |
4 |
|
B |
4 |
14 |
|
C |
5 |
4 |
|
D |
5 |
14 |
Question 10
The order of the elements in the periodic table is
according to relative atomic mass
by nuclear charge
by reactivity
in order of electronegativity
