Uvero — STEM Learning

Concept Map

Organise the vocabulary, quantities and relationships into a connected model.

This extension applies that lens specifically to Elements and Compounds.

Pure substances come in two kinds:

An element is made of only one type of atom and cannot be broken into simpler substances by chemical means. Copper ( $\text{Cu}$ ), oxygen ( $\text{O}_2$ ) and carbon ( $\text{C}$ ) are elements. The periodic table is the list of all known elements.
A compound is two or more elements chemically bonded in a fixed ratio. Water ( $\text{H}_2\text{O}$ ) is always two hydrogen atoms to one oxygen. Table salt is sodium chloride ( $\text{NaCl}$ ).

A compound's properties are usually nothing like the elements that formed it. Sodium is a metal that reacts violently with water; chlorine is a poisonous green gas — yet bonded together they make the salt on your chips.

Chemistry — Grade 10 — Concept Map: Which substance is a compound?

$\text{Cu}$ (copper)

$\text{O}_2$ (oxygen gas)

$\text{CO}_2$ (carbon dioxide)

$\text{Fe}$ (iron)

Chemistry — Grade 10 — Concept Map: In water, $\text{H}_2\text{O}$ , the ratio of hydrogen atoms to oxygen atoms is always…

1 : 1

2 : 1

1 : 2

any ratio you like

Chemistry — Grade 10 — Concept Map: Is $\text{O}_2$ (oxygen gas) an element or a compound? Answer with one word.

Name the original topic being extended by this concept map lesson.

Which statement is the best evidence-led starting point for Elements and Compounds: Concept Map?

Pure substances come in two kinds: - An element is made of only one type of atom and cannot be broken into simpler substances by chemical means. Copper ( $\text{Cu}$ ), oxygen ( $\text{O}_2$ ) and carbon ( $\text{C}$ ) are elements. The periodic table is the list of all known elements. - A compound is two or more elements chemically bonded in a **f

Pure Substances and Mixtures

Separating Mixtures

A conclusion needs no observations, calculations or stated assumptions.