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  1. Problems
  2. /Structure of the Atom
  3. /Electronic Configuration and Valency

Electronic Configuration and Valency

Chemistry
+ Upload a Problem
More in Structure of the AtomSubatomic Particles and Atomic ModelsElectronic Configuration and ValencyIsotopes and IsobarsLight, Atomic Spectra and the Bohr ModelQuantum Mechanical Model of the Atom
16 problems
Type:
1.
Write the electron configurations of V²⁺, Co³⁺, Cu⁺ and Mn²⁺.
High School (11–12) · Electronic Configuration and Valency, Quantum Mechanical Model of the AtomStemPy LabStemPy Lab
Medium
2.
By the usual order of filling, copper should be [Ar] 3d⁹ 4s².
High School (11–12) · Electronic Configuration and Valency, Quantum Mechanical Model of the AtomStemPy LabStemPy Lab
Medium
3.
Write the electron configurations of silicon (Z = 14), vanadium (Z = 23) and manganese (Z = 25)…
High School (11–12) · Electronic Configuration and Valency, Quantum Mechanical Model of the AtomStemPy LabStemPy Lab
Easy
4.
Find the valency of the elements with these atomic numbers: 6, 9, 11, 13 and 15.
High School (9–10), General · Periodic Trends, Electronic Configuration and ValencyStemPy LabStemPy Lab
Medium
5.
Why do lithium, sodium and potassium all have a valency of 1?
High School (9–10), General · Periodic Trends, Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy
6.
Selenium is in group 16, below sulphur. Its arrangement is 2, 8, 18, 6.
High School (9–10), General · Periodic Trends, Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy
7.
Lithium-7 has an atomic number of 3. The lithium ion, Li⁺, has a charge of +1.
High School (9–10), General · Electronic Configuration and Valency, Isotopes and IsobarsStemPy LabStemPy Lab
Medium
8.
An atom has 19 protons and 20 neutrons. The element is potassium, K.
High School (9–10), General · Electronic Configuration and Valency, Isotopes and IsobarsStemPy LabStemPy Lab
Easy
9.
Sulphur has an atomic number of 16. Find the number of protons, neutrons and electrons in a neutral…
High School (9–10), General · Electronic Configuration and Valency, Isotopes and IsobarsStemPy LabStemPy Lab
Easy
10.
The calcium ion, Ca²⁺, and the chloride ion, Cl⁻, each have the same electron arrangement as a…
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Medium
11.
Which of these atoms have a full outer shell?
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy
12.
Find the valency of lithium (2, 1), fluorine (2, 7), phosphorus (2, 8, 5) and argon (2, 8, 8).
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy
13.
A student writes the electron arrangement of sodium, which has 11 electrons, as 2, 9.
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Medium
14.
Potassium has an atomic number of 19. Write its electron arrangement.
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Medium
15.
Write the electron arrangement of boron (Z = 5), phosphorus (Z = 15) and calcium (Z = 20).
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy
16.
Use the formula 2n² to find the most electrons that the K, L, M and N shells can hold.
High School (9–10), General · Electronic Configuration and ValencyStemPy LabStemPy Lab
Easy