Chemistry Final MC Questions

What determines the position of each element in the periodic table?

What is the formula mass of (NH₄)₂SO₄?

The discovery of what elements added a new column to Mendeleev's periodic table?

What is the sum of the atomic masses of all the atoms in a formula for a compound

Properties of elements usually repeat at regular intervals when the elements are arranged in order of increasing

Person who came up with the idea to arrange the elements in the P.T. according to their chemical and physical properties

A measurement that closely agrees with an accepted value is best described as

A neutral group of atoms held together by covalent bonds is a

If 4g of element A combine with 10g of element B, then 12g of element A will combine with how many grams of element B?

What is the oxidation number of a pure element?

The atomic theory proposed by Dalton has been...

In the three molecules, O₂, HCl, and F₂, what atom would have a partial negative charge?

Mendeleev left spaces in his periodic table and predicted the existence of three elements and their

How many orientations can an s orbital have about the nucleus?

How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF₄

The frequency of electromagnetic radiation is measured in waves/second, or

A chemical change occurs when

A chemical reaction involving substances A and B stops when B is completely used. B is the

To balance a chemical equation, it may be necessary to adjust the

The person whose work led to a periodic table based on increasing atomic number was

Malleability and ductility are characteristics of substances with

In a polyatomic ion, the algebraic sum of the oxidation numbers of all the atoms is equal to

The Aufbau principle states that an electron

Branch of chemistry that deals with the relation between the quantities of reactants and products in chemical reactions

To which group do fluorine and chlorine belong?

The coefficients in a chemical equation represent the

The main energy level of an atom is represented by its

What group satisfies the octet rule without forming compounds?

A chemical formula includes the symbols of the elements in the compound and subscripts that indicate

Applied research is carried out in order to

To completely convert 6.0 mol of H₂ to NH₃ in the equation N₂(g)+3H₂(g)--> 2NH₃(g), how many moles of N₂ are required?

What can be predicted by using an activity series?

To draw a Lewis structure, one must know the

In a double replacement rxn, hydrogen chloride and sodium hydroxide react to produce sodium chloride. Another product is

Which observation does not indicate that a chemical reaction has occurred?

What are the elements with atomic numbers from 58 to 71 called?

An element in the activity series can replace any element

According to the law of conservation of mass, the total mass of the reacting substances is

In a compound, the algebraic sum of the oxidation numbers of all atoms equals

Which reactant controls the amount of product formed in a chemical reaction?

What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?

The number of orbitals in the d sublevel is

Nonpolar covalent bonds are not common because

In the word equation, sodium oxide + water --> sodium hydroxide, the formula for sodium hydroxide is represented by

Visible light, x rays, infrared radiation, and radio waves all have the same

Which coefficients correctly balance the formula equation NH₄NO₂(s)--> N₂(g) + H₂O(l)?

Both the Heisenburg Uncertainty Principle and the Schrodinger Wave Equation

To balance a chemical equation, it may be necessary to adjust the

If a mixture is uniform in composition, it is said to be

The set of orbitals that are dumbbell shaped and directed along the x, y, and z axes are

Which of the following is not a physical change?

A chemical formula written over the arrow in a chemical equation signifies

His cathode ray experiment proved the existence of electrons

Mendeleev did not always list elements in his P.T. in order of increasing atomic mass because he grouped together

By the equation SO₃+H₂O-->H₂SO₄, how many grams of SO₃ are required to produce 2.00 mol of H₂SO₄ in an excess of H₂O?

What is the balanced equation when aluminum reacts with copper(II) sulfate?

Which of the rules requires that each of the p orbitals receive an electron before any of them can have two electrons?

In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

The molecular formula for vitamin C is C₆H₈O₆. What is the empirical formula?

In the reaction represented by the equation N₂+3H₂-->2NH₃, what is the mole ratio of hydrogen to ammonia?

Introduced the concept of orbital diagrams

A chemical can be defined as

First to postulate that electrons orbit the nucleus

In Mg+2HCl-->H₂+MgCl₂, find the percent yield of MgCl₂ if 100. g if Mg reacts with excess HCl to yield 330. g of MgCl₂

The ions in most ionic compounds are organized into a

The units of molar mass are

If a metal is placed in an ionic solution containing another metal and no reaction occurs, then the original metal is

Elements in a group or column in the periodic table can be expected to have similar

Use VSEPR theory to predict the shape of the hydrogen chloride molecule, HCl

A solid substance is

The substance whose Lewis structure shows three covalent bonds is

The major difference between the 1s and 2s orbital is that

Argon, krypton, and xenon are

The letter designations for the first 4 sublevels with the max number of electrons that can be fit in each sublevel are

Rutherford's experiments led him to conclude that atoms contain massive central regions that have...

In the equation 2Al(s) + 3Fe(NO₃)₂(aq) --> 3Fe(s) + 2Al(NO₃)₃(aq), iron has been replaced by

The element with the electron configuration 1s22s22p63s23p2 is

A volume of 1 millimeter is equivalent to

Predict what happens when nickel is added to a solution of potassium chloride

A chemical equation is balanced when the

Basic research is usually performed

The density of aluminum is 2.70 g/cm³. What is the mass of a solid piece of aluminum with a volume of 1.50 cm³?

The quantum number that indicates the position of an orbital about the three axes in space is the

The electrons involved in the formation of a chemical bond are called

If a mixture is not uniform throughout, it is called

The horizontal rows on the periodic table are called

The liter is defined as

Which of the following is not a chemical change?

The molar mass of an element is the mass of one

An orbital that can never exist according to the quantum description of the atom is

The distance between two successive peaks on adjacent waves is its

What are the radioactive elements with atomic numbers from 90 to 103 called?

A formula that shows the simplest whole-number ratio of the atoms in a compound is the

Which equation is not balanced?

Mendeleev predicted that the spaces in his periodic table represented

Bonding in molecules or ions that cannot be correctly represented by a single Lewis structure is

A measure of the quantity of matter is

The principle that states the phys. and chem. properties of elements are periodic functions of their atomic numbers is

The mixing of two or more atomic orbitals of similar energies on the same atom to produce new orbitals of equal energies

The forces of attraction between molecules in a molecular compound are