Exam 2: Atoms, Molecules, and Ions

In the early 1900s, Ernest Rutherford performed an experiment with gold foil targets and alpha particles to probe the structure of the atoms.He observed that most of these alpha particles penetrated the foil undeflected.Realizing that atoms are electrically neutral (that is, they have equal numbers of protons and electrons)and that the mass of a proton is significantly greater than the mass of an electron, use Rutherford's data to propose a structural model of an atom.

Give the formula for lithium hydroxide.

The Stock system name for As₂S₅ is

How many protons are there in one atom of nickel?

How many neutrons are there in an atom of uranium whose mass number is 235?

Give the formula of sulfuric acid.

Give the formula of hydrochloric acid.

Which of the following elements is chemically similar to magnesium?

Give the formula for carbon disulfide.

What is the formula for the ionic compound formed by magnesium and iodine?

Name the following compound: NaNO₂.

Which one of the following elements is most likely to form a 2+ ion?

Write the formula of calcium carbonate.

Name the following ternary compound: FeSO₄.

The mineral orpiment, having the empirical formula As₂S₃, was used in ancient times as a cosmetic. What mass of arsenic is present in 5.0 g of orpiment? [Given: naturally occurring arsenic is all arsenic-75; assume that all naturally occurring sulfur is sulfur-32 (only approximately true)]

Name the straight chain hydrocarbon that contains eight carbon atoms.

The formula for magnesium sulfate is

An empirical formula tell us which elements are present in a compound and gives us the simplest, whole-number ratio of the atoms of these elements in the compound.

Write the formula for the acid formed from the hydrogen sulfate anion, and then name the acid.

The formula for isopropyl alcohol is sometimes written as (CH₃)₂CHOH to better indicate how the atoms are connected.How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?