Which of the following groups of atoms are most likely to have similar properties?

1.nickel (28), calcium (20), bromine (35)

2.aluminum (13), germanium (32), antimony (51)

3.oxygen (8), selenium (34), tellurium (52)

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

How many moles of al3+ ions are in 1.25 moles of al2o3

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)