A card from a free library — ask anything, no account, works offline. Every card carries its source.
Hafnium (Hf) — element 72
reference
Atomic number 72. Symbol Hf. Standard atomic weight 178.49. The hafnium atom carries 72 protons in its nucleus; its place in the periodic table is fixed by that count. Verified reference data.
source
Verified reference — chemistry
card id
card_ref_el_072
adjoining cards
- on the shelf of → The periodic table — the map of the elements — an element of the periodic table
- precedes → Lutetium (Lu) — element 71 — the next element by atomic number (Z 71 → 72)
- on the shelf of → The created order — the science of the floor — an element of the created order (Genesis 1) — matter God spoke into being
- precedes → Tantalum (Ta) — element 73 — the next element by atomic number (Z 72 → 73)
Is this card incomplete? Tell the library — it will call out for more ↗