Valence Electrons And Ionic Compounds
Which statement best explains why a chemical bond forms between two atoms?
Rubidium is in Group 1 of the periodic table. Predict the formula of the compound formed between rubidium and bromine, and identify the type of bonding present.
A student claims that fluorine is more reactive than iodine because fluorine has more valence electrons. Evaluate this claim.
Determine the correct formula for the ionic compound formed between calcium and nitrogen.
A researcher discovers a new element, Element X, in Group 13 of the periodic table. If Element X reacts with fluorine, which formula is most likely for the resulting compound?
Explain why potassium reacts more vigorously with water than sodium does, even though both are Group 1 metals.
An industrial chemist needs a compound with properties similar to MgO but wants to substitute a different Group 2 metal. Which compound would be the best analogue?
Which pair of elements is most likely to form an ionic bond?
A student writes the formula for the compound formed between aluminum and oxygen as AlO. Identify the error and determine the correct formula.
In deep-ocean hydrothermal vents, dissolved minerals crystallise as metal sulfides. A geochemist finds a sulfide mineral containing only a Group 1 metal and sulfur. Without knowing which specific Group 1 metal is present, what formula can the geochemist predict for this mineral?
Which observation best supports the conclusion that reactivity increases going down Group 1 of the periodic table?
A student is asked to predict the charge on a chromium ion in an ionic compound. The student uses chromium’s group number (Group 6) and predicts Cr⁶⁺. Why is this approach unreliable?
Selenium (Se) is in Group 16, directly below sulfur. Predict the formula of hydrogen selenide and identify which known compound it is analogous to.
When magnesium reacts with oxygen, the product MgO forms rather than MgO₂ or Mg₂O. Which explanation correctly accounts for this specific formula?
A materials scientist is developing a new ceramic and needs a compound where the metal-to-nonmetal ratio is 2:3. Which combination of elements would produce this ratio?
Consider the following ionic compounds: NaF, MgO, and AlN. All three have ions that are isoelectronic with neon. Which compound would you expect to have the strongest coulombic attraction between its ions?