Chemistry Final Part 2

Mendeleev noticed that prop of elements usually repeated at reg intervals when the elements were arranged in increasing

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

In the equation 2Al(s) + 3Fe(NO₃)₂ (aq) +2Al(NO₃)₃(aq), iron has been replaced by

The molecular formula for vitamin C is C₆H₁₂O₆. What is the empirical formula?

The ions in most ionic compounds are organized into a

To draw a Lewis structure, one must know the

Which of the following would be investigated in reaction stoichiometry?

What is the name of a list of elements arranged according to the ease with which they undergo certain chemical reactions

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

The most reactive group of the nonmetals is the

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

In a row in the periodic table, as the atomic number increases, the atomic radius generally

a double replacement reaction, hydrogen chloride and sodium hydroxide react to produce sodium chloride. Another product-

The substances whose Lewis structure shows three covalent bonds is

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

Compared with ionic compounds, molecular compounds

Which is the best reason that the atomic radius generally increases with atomic number in each group of elements?

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

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

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

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

When atoms share electrons, the electrical attraction of an atom for the shared electrons is called the atom’s

In the equation 2KClO₃ → 2KCl + 3O₂, how many moles of oxygen are produced when 3.0 mol of KClO₃ decompose completely?

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

Nonpolar covalent bonds are not common because

principle that states that the physical and chemical properties of the elements are periodic functions of their atomic #

The energy required to remove an electron from an atom is the atom's

As atoms bond with each other they

Malleability and ductility are characteristics of substances with

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

Compared with molecular bonds, the strength of a intermolecular forces is

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

As independent particles, most atoms are

measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is

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

According to VSEPR theory the structure of the ammonia molecule, NH₃, is

What group of elements satisfies the octet rule without forming compounds

To which group do fluorine and chlorine belong?

across a period in the periodic table, atomic radii

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

The element that has the greatest electronegativity is

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

The molar mass of an element is the mass of one

If a material can be shaped or extended by physical pressure, such as hammering, which property does the material have

An element in the activity series can replace any element

A mutual attraction between the nuclei and valence electrons of different atoms that binds atoms together is called a(n)

Which of the following shows the types and numbers of atoms joined in a single molecule of a molecular compound?

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

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

In the reaction represented by the equation 2Al₂O₃ →4Al + 3O₂, what is the mole ratio of aluminum to oxygen?

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

Within a group of elements, as the atomic number increase, the atomic radius

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

Moseley’s work led elements with similar properties occur at reg intervals when the elements were arranged in increasing

What is the correct Lewis structure for hydrogen chloride, HCL?

What is removed when the ionization energy is supplied to an atom of an element?

In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by

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

The elements in group 1 are also known as the

The forces of attractions between molecules in a molecular compounds are

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

The B--F bond in BF₃ (electronegativity for B is 2.0; electronegativity for F is 3.0) is

electrostatic repulsion between electron pairs surrounding an atom causes these pairs to be separated as far as possible

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

A negative ion is known as a(n)

What can be predicted by using an activity series?

A balanced chemical equation allows one to determine the

What is the oxidation number of a pure element

The main energy levels of an atom are indicated by the

What is shared in a covalent bond?

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

Idea of arranging the elements in the periodic table according to their chemical and physical properties attributed to

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

a metal is placed in an ionic solution containing another metal and NO REACTION occur; the metal originally in the sol

In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)

periodic law states that the prop of elements are periodic funcs of their atomic #. What determines the position of each

In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy lvl

If the atoms that share electrons have an unequal attraction for the electrons, the bond is called

A positive ion is known as a(n)

The mixing of 2+ atomic orbitals of similar energies on the same atom to produce new orbits of equal energies is called

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

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

When the formula equation Fe₃O₄ + Al₂O₃ + Fe is correctly balanced the coefficient of Fe is number