An atom has atomic number 16. How many electrons are in its outer shell?
Answer and explanation
Correct answer: C.
- Step 1: Fill the shells in the order 2, 8, 8, 2: 2, 8, 6.
- Step 2: The outer shell holds 6 electrons.
Answer
.
Why not the others: : All electrons were counted. : An inner shell was counted. : The number missing from a full shell of eight was given.
Practise more Physical Sciences and Chemical Systems.
Free questions with an explanation for every one, and full timed Egyptian STEM Schools Admissions Assessment mock tests.
More Physical Sciences and Chemical Systems questions
- A solid wooden cube of side and density floats in pure water (density ). What depth of…
- What is the balanced stoichiometric coefficient of when propane () undergoes complete combustion to produce carbon dioxide and…
- A cart of mass traveling at collides with a stationary cart of mass . If they couple together afte…
- Which type of chemical bond is formed when two atoms share valence electrons equally due to identical or negligible electronegativity differ…
- An electric circuit contains three resistors of resistances , and connected in parallel across a…
- What is the molar mass of sulfuric acid ()? (Atomic masses: )