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What is the resultant electrical charge on an atom with two protons and two electrons?

by Dr. Osama M. Khaled — published Jun 04, 2024 — last modified Jun 04, 2024 12:21 PM Located in Physics / Atoms and Molecules / Atoms and Molecules

If an atom is normally electrically neutral, what can you say about the number of electrons and protons?

by Dr. Osama M. Khaled — published Jun 04, 2024 Located in Physics / Atoms and Molecules / Atoms and Molecules

AWS architecture practice exam 1

by Dr. Osama M. Khaled — published Nov 10, 2024 — last modified Jul 06, 2025 11:23 PM

Essential practice questions to refresh memory about basic concepts in AWS

Located in Computing / … / Technology / Amazon Web Services (AWS)

Amon these choices, what is a core capability of Amazon Lex?

by Dr. Osama M. Khaled — published Sep 17, 2025 — last modified Nov 09, 2025 08:55 PM Located in Computing / … / Amazon Web Services (AWS) / AWS Certified AI Practitioner Practice Exam

Requirements Analyzer

by Dr. Osama M. Khaled — published Dec 28, 2025 — last modified Jan 06, 2026 12:51 PM

This tool uses Natural Language Processing (NLP) and AI technology to analyse unstructured text and extract requirements details in a structure format

Located in Tools / Computing Tools

How many molecules are in 44 grams of carbon dioxide?

by Dr. Osama M. Khaled — published Jun 16, 2024 — last modified Jun 16, 2024 07:00 AM Located in Physics / Atoms and Molecules / Avogadro's Number

How many molecules are in 11 grams of carbon dioxide?

by Dr. Osama M. Khaled — published Jun 16, 2024 Located in Physics / Atoms and Molecules / Avogadro's Number

What is the mass (in grams) of one molecule of carbon dioxide?

by Dr. Osama M. Khaled — published Jun 16, 2024 Located in Physics / Atoms and Molecules / Avogadro's Number

Self Test

by Dr. Osama M. Khaled — published Jun 16, 2024 — last modified Jul 13, 2024 01:03 PM — filed under: Year 10

Test your knowledge in atoms and molecules

Located in Physics / Atoms and Molecules

Identify the substances below as element or compound

by Dr. Osama M. Khaled — published Jun 16, 2024 Located in Physics / Atoms and Molecules / Self Test

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