Uvero — STEM Learning

Concept Map

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

This extension applies that lens specifically to Introduction to Chemical Bonding.

Atoms bond to reach a stable, full outer shell (like the noble gases). There are two main ways for the first-20 elements:

Ionic bonding — between a metal and a non-metal. The metal gives away its outer electron(s) and the non-metal takes them. The atoms become charged ions ( $+$ and $-$ ) that attract each other. Example: $\text{Na}^{+}$ and $\text{Cl}^{-}$ in table salt, $\text{NaCl}$ .
Covalent bonding — between two non-metals. The atoms share electron pairs. Example: two hydrogens share to make $\text{H}_2$ ; oxygen and hydrogens share in $\text{H}_2\text{O}$ .

Rule of thumb: metal + non-metal → ionic (transfer); non-metal + non-metal → covalent (sharing).

Chemistry — Grade 10 — Concept Map: Sodium (a metal) and chlorine (a non-metal) form $\text{NaCl}$ . What type of bond is this?

Covalent

Ionic

No bond

Metallic

Chemistry — Grade 10 — Concept Map: In a covalent bond, the atoms…

transfer electrons to form ions

share pairs of electrons

lose all their electrons

gain protons

Chemistry — Grade 10 — Concept Map: When a sodium atom loses one electron it becomes a charged particle. What is the general name for a charged atom? (one word)

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

Which statement is the best evidence-led starting point for Introduction to Chemical Bonding: Concept Map?

Atoms bond to reach a stable, full outer shell (like the noble gases). There are two main ways for the first-20 elements: - Ionic bonding — between a metal and a non-metal. The metal gives away its outer electron(s) and the non-metal takes them. The atoms become charged ions ( $+$ and $-$ ) that attract each other. Example: $\text{Na}^{

Pure Substances and Mixtures

Elements and Compounds

A conclusion needs no observations, calculations or stated assumptions.