{"id": "card_ref_el_040", "kind": "reference", "title": "Zirconium (Zr) — element 40", "body": "Atomic number 40. Symbol Zr. Standard atomic weight 91.224. The zirconium atom carries 40 protons in its nucleus; its place in the periodic table is fixed by that count. Verified reference data.", "source": {"label": "Verified reference — chemistry", "url": "", "domain": "chemistry", "authority_tier": "reference"}, "shelf": "chemistry", "box": "reference", "bands": ["reference", "chemistry", "periodic table", "Zr", "zirconium"], "connections": [{"to_card_id": "card_n_6e7a5b14e556", "relationship": "member_of", "evidence": "an element of the periodic table"}, {"to_card_id": "card_ref_el_039", "relationship": "precedes", "evidence": "the next element by atomic number (Z 39 → 40)"}, {"to_card_id": "card_k_spine_created_order", "relationship": "member_of", "evidence": "an element of the created order (Genesis 1) — matter God spoke into being"}, {"to_card_id": "card_ref_el_041", "relationship": "precedes", "evidence": "the next element by atomic number (Z 40 → 41)"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "subject": "zirconium", "presentation": {"glyph": "•", "kind_label": "reference", "by": "Verified reference — chemistry", "authority": "reference", "posted": "", "standing": ""}, "neighbors": [{"id": "card_n_6e7a5b14e556", "title": "The periodic table — the map of the elements", "relationship": "on the shelf of", "why": "an element of the periodic table", "href": "/card/card_n_6e7a5b14e556", "resolved": true}, {"id": "card_ref_el_039", "title": "Yttrium (Y) — element 39", "relationship": "precedes", "why": "the next element by atomic number (Z 39 → 40)", "href": "/card/card_ref_el_039", "resolved": true}, {"id": "card_k_spine_created_order", "title": "The created order — the science of the floor", "relationship": "on the shelf of", "why": "an element of the created order (Genesis 1) — matter God spoke into being", "href": "/card/card_k_spine_created_order", "resolved": true}, {"id": "card_ref_el_041", "title": "Niobium (Nb) — element 41", "relationship": "precedes", "why": "the next element by atomic number (Z 40 → 41)", "href": "/card/card_ref_el_041", "resolved": true}]}