Module 2 Flashcards

1
Q

Atoms consist of

A

a single nucleus
with positive charge

surrounded by
a cloud of negatively charged
electrons.

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2
Q

When atoms approach one another closely,

A

electron clouds interact with each other and with
the nuclei.

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3
Q

If this interaction is such that the total energy of
the system is

A

Lowered

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4
Q

atoms bond
together to form a

A

molecule.

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5
Q

consist of an aggregation of atoms held together by valence forces .

A

Molecules

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6
Q

A molecule consist of ____________ held together by valence forces

A

Aggregation of atoms

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7
Q

group of two or more atoms that form the smallest identifiable unit

A

Molecules

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8
Q

Molecules are a group of two or more atoms that form the smallest identifiable unit into which
a pure substance can be divided and

A

still retain the composition and chemical
properties of that substance.

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9
Q

Contain two atoms that are chemically bonded.

A

Diatomic molecules

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10
Q

Contain two identical atoms that are chemically bonded.

A

Homonuclear

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11
Q

Contain two different atoms that are chemically bonded.

A

Heteronuclear

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12
Q

Molecules containing more than two atoms.

A

Polyatomic molecules:

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13
Q

The fundamental principle of chemistry is that

A

the atoms of
different elements can combine with one another to form
chemical compounds.

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14
Q

a distinct substance formed by chemical
union of two or more elements in definite proportion by weight.

A

Chemical compound

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15
Q

Subscripts represent the

A

number of atoms

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16
Q

True or False: It is impossible for the same kind of atoms to combine in the same
proportion to form a different type of molecule.

17
Q

identical atoms bonding together with identical
proportions and differ only in arrangements.

18
Q

isomers are identical atoms bonding together with identical
proportions and differ only in __________.

A

Arrangement

19
Q

Example of isomers

A

Ethyl alcohol ( CH3CH2OH)
Methyl ether (CH3OCH3

20
Q

are atoms (assemblies of atoms) that have a net electrical charge.

21
Q

ions that contain fewer electrons than protons have a net positive charge.

22
Q

ions that contain more electrons than protons have a net negative charge.

23
Q

contain both cations and anions in a ratio that
results in no net electrical charge.

A

Ionic Compounds

24
Q

electrons are shared between bonded
atoms and are simultaneously attracted to more than one nucleus.

A

Covalent compounds

25
Contrast to covalent compounds, ionic compounds contain _________________ rather than discrete neutral molecules.
Anions and cations
26
Ionic Compounds are held together by
the attractive electrostatic interactions between cations and anions.
27
The cations and anions are arranged in space to form
extended three-dimensional array that maximizes the number of electrostatic interactions minimizes the number of repulsive electrostatic interactions.
28
contain both cations in a ratio that results in zero electrical charge.
Ionic compounds
29
If the electrostatic energy is positive, the particles ________ each other;
Repel
30
If the electrostatic energy is negative, the particles _________ each other.
are attracted to
31
The name of a _______________ is simply the name of the element followed by the word ion.
Monoatomic cation
32
an ion’s positive charge is indicated by a roman numeral in parentheses after the element name, followed by the word ion.
Stock System
33
The ______________ uses two suffixes (-ic and -ous) that are appended to the stem of the element name.
Common System
34
The ____________ suffix represents the greater of the two cation charges,
-ic
35
the _________ suffix represents the lower one.
-ous
36
In many cases, the stem of the element name comes from the ________ name of the element.
Latin