Ages 11–12🔬 Science12 verified questions on this shelf

Atoms, Elements & Compounds

Explain the differences between atoms, elements, and compounds; describe the simple Bohr model of the atom (nucleus with protons and neutrons, electrons in shells); and write and interpret chemical symbols and simple formulae

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Question 1 of 3

Which of the following is a compound?

Question 2 of 3

Which of the following correctly classifies each item in the order given? 1. A single chlorine atom (Cl) 2. A solid piece of pure aluminum metal 3. One molecule of hydrogen chloride (HCl)

Question 3 of 3

Which of the following correctly describes the number of atoms of each element in a single molecule of water (H₂O)?

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What a child can do after this Skill

Defines atom, element, and compound and distinguishes between them with examples
Draws a simple Bohr model of an atom labelling nucleus (protons/neutrons) and electron shells
Reads a chemical formula to identify the elements and number of each atom (e.g. H₂O, CO₂, NaCl)
Identifies the difference between a mixture and a compound

Curriculum standards this Skill teaches

KS3.Sci.Chem.AEC.2 — Atoms, Elements and Compounds
MS-PS1-1 — Model the atomic composition of molecules
ICSE.Class9.Chemistry.AtomicStructure — Atomic structure: protons, neutrons, electrons, isotopes
KS3.Sci.Chem.AEC.1 — Bohr Model of the Atom
KS3.Sci.Chem.AEC.3 — Chemical Symbols and Formulae

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.