Test 4

Question 1

Which of the following is not a principle of the atomic theory?

Answer 1

All atoms are made of subatomic particles

Question 2

What substances are composed of a single type of atom?

Answer 2

elements

Question 3

What is the only metal that is liquid at room temperature?

Answer 3

mercury

Question 4

Which idea states that tiny particles do not absorb or release energy in a smooth flow?

Answer 4

quantum theory

Question 5

What idea states that no two electrons in an atom can have the same four quantum numbers?

Answer 5

Pauli exclusion principle

Question 6

What idea states that it is impossible to simultaneously know both the velocity and position of an electron?

Answer 6

Heisenberg uncertainty principle

Question 7

Which subatomic particle has a negative charge?

Answer 7

electron

Question 8

Which type of chemical bonding results from the transfer of electrons?

Answer 8

ionic

Question 9

In which type of chemical bonding are electrons shared among all atoms in the substance?

Answer 9

metallic

Question 10

Which type of chemical formula shows the general arrangement of atoms in molecules?

Answer 10

structural

Question 11

What are molecules with the same number and types of atoms in different arrangements?

Answer 11

isomers

Question 12

What are atoms of the same element that have different mass numbers?

Answer 12

isotopes

Question 13

The rule that most atoms tend to react to obtain eight electrons in the outermost shell is the ? rule

Answer 13

octet

Question 14

If an atom is covalently bonded to an atom with a different electronegativity, then the bond between them is?

Answer 14

polar

Question 15

The name of the compound that contains one uranium atom and six fluorine atoms is?

Answer 15

uranium hexafluoride

Question 16

Electrons that are shared by more than two atoms are said to be?

Answer 16

delocalized

Question 17

By physical properties, elements are divided into three groups: metals, semimetals, and ?

Answer 17

nonmetals

Question 18

If three pairs of electrons are shared between two atoms, the resulting bond is a(n) ? bond.

Answer 18

triple

Question 19

An atom that has a positive electrical charge because of losing electrons is a(n)?

Answer 19

cation

Question 20

Which of the following elements is an alkali metal?

Answer 20

sodium

Question 21

In what type of radioactive decay is an electron emitted?

Answer 21

beta

Question 22

What is the general name given to any row of elements of the periodic table?

Answer 22

period

Question 23

What is the simplest ratio of atoms in a nonmolecular compound?

Answer 23

formula unit

Question 24

Which of the following does not increase the rate at which a substance dissolves?

Answer 24

increasing concentration

Question 25

Inside what regions do electrons move unpredictably according to the electron-cloud model of the atom?

Answer 25

orbitals

Question 26

What element makes up most of the mass of the human body?

Answer 26

oxygen

Question 27

What term refers to the minimum amount of fissionable material required for a chain reaction to occur?

Answer 27

critical mass

Question 28

What are theoretical particles that may compose both protons and neutrons?

Answer 28

quarks

Question 29

What is the ability of a substance to dissolve in another substance?

Answer 29

solubility

Question 30

What property describes how strongly atoms of an element pull on electrons in a chemical bond?

Answer 30

electronegativity

Question 31

What type of substance in MnO4-

Answer 31

polyatomic ion

Question 32

What process occurs when an atomic nucleus breaks up or changes, emitting radiation?

Answer 32

radioactive decay

Question 33

What is a diagram showing the locations of all the atoms and outermost electrons in a compound?

Answer 33

Lewis structure

Question 34

What is the time required for one half of a radioactive sample to decay into a new substance?

Answer 34

half-life

Question 35

How many atoms of hydrogen are in the compound C2H4O2?

Answer 35

four

Question 36

What is a mixture containing tiny suspended clumps or particles called?

Answer 36

colloid

Question 37

What term describes the outermost shell of electrons of any atom?

Answer 37

valence electrons

Question 38

What is the sum of the atomic masses of all the atoms in a molecule?

Answer 38

molecular mass

Question 39

oxygen

Answer 39

O

Question 40

potassium

Answer 40

K

Question 41

sodium

Answer 41

Na

Question 42

gold

Answer 42

Au

Question 43

The process of combining two nuclei to form a heavier nucleus is fission

Answer 43

fusion

Question 44

The law stating that elements show regular and repeating properties when arranged by increasing atomic numbers is the periodic law.

Answer 44

true

Question 45

A substance that comes out of solution is said to precipitate.

Answer 45

true

Question 46

If the molecules of a mixture are not completely mixed together, the substance is a homogeneous mixture.

Answer 46

heterogeneous

Question 47

A substance with strong intermolecular forces typically has a lower boiling point than a substance with weak intermolecular forces.

Answer 47

higher

Question 48

Protons and neutrons are found in the atomic nucleus.

Answer 48

true

Question 49

The substance in a solution that is dissolved is the solvent

Answer 49

solute