Exam 2: Atoms, Molecules, and Ions

Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be .

The species contains 16 neutrons.

Which pair of elements is most apt to form an ionic compound with each other?

The formula for aluminum hydroxide is .

Which species is an isotope of ³⁹Cl?

The formula of bromic acid is _.

Vanadium has two naturally occurring isotopes, ⁵⁰V with an atomic mass of 49.9472 amu and ⁵¹V with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent abundances of the vanadium isotopes are _% ⁵⁰V and _ % ⁵¹V.

An empirical formula always indicates .

An unknown element is found to have three naturally occurring isotopes with atomic masses of 35.9675 (0.337%), 37.9627 (0.063%), and 39.9624 (99.600%). Which of the following is the unknown element?

Predict the charge of the most stable ion of fluorine.

The formula of the carbonate ion is .

Cathode rays are .

420 ppm is the same as _ _ Angstroms.

Which formula/name pair is incorrect?

The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is amu.

The formula for zinc phosphate isZn₃(PO₄)₂. What is the formula for cadmium arsenate?

Element M reacts with fluorine to form an ionic compound with the formula MF₃. The M- ion has 18 electrons. Element M is .

The name of the ionic compound V₂O₃ is _ .

and reside in the atomic nucleus.

A molecular formula always indicates .