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Physical Science > Section 5 Study Guide > Flashcards

Section 5 Study Guide Flashcards

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1
Q

A mixture is different from a compound because each substance in a mixture __

A

retains its own properties

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2
Q

Each molecule of hydrochloric acid, HCl, contains one atom of hydrogen and __

A

one atom of chlorine

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3
Q

Which substance do the molecules have the strongest attractions to one another?

A

sugar, a solid

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4
Q

Often atoms join so that each atom will have __

A

an outermost energy level that is full of electrons

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5
Q

In a metallic bond, the nucleus of one atom is attracted by a nearby atoms’s __

A

electrons

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6
Q

Solid ionic compounds have very high melting points because they __

A

contain charged ions that are locked tightly together

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7
Q

The name for the compound with the formula CuBr2 would be written as __

A

copper (II) bromide`

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8
Q

Formaldehyde, CH2O, and acetic acid, C2H4O2, have the same empirical formula but different __

A

molecular formulas

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9
Q

The simplest organic compound is ___

A

methane

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10
Q

Polymers are large organic molecules that are made of __

A

repeating units

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11
Q

A protein is a polymer that is made of __

A

amino acids

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12
Q

Unlike a mixture, a compound has a ___ that is always the same

A

chemical formula

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13
Q

Formula units of salt, NaCl, contain equal numbers of __ and __

A

sodium ions, chloride ions

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14
Q

A ___ formula resembles a ball and stick model of a compound except chemical symbols are used to represent the atoms

A

structural

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15
Q

In ionic compounds, the positive charged ions are formed from __ elements

A

metal

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16
Q

A __ bond is formed by the attraction between positively charged metal ions and the electrons around them

A

metallic

17
Q

A compound consisting of Br- and CD2+ ions would be named

A

cadmium (II) bromide

18
Q

The simplest formula for a covalent compound is its __ formula

A

empirical

19
Q

__ are compounds that have repeating subunits

A

polymers

20
Q

The forces that hold different atoms or ions together are __

A

chemical bonds

21
Q

Each molecule of table sugar, C12H22011, contains __ atoms of carbon

A

12

22
Q

Gases take up a lot of space because gas molecules __

A

are not attracted to one another

23
Q

Covalent bonds are formed between __

A

nonmetal atoms

24
Q

Copper is a good conductor of electricity because its electrons

A

can move from atom to atom

25
Q

The name dinitrogen tetroxide tells you that this compound contains _ N atoms and _O atoms

A

2; 4

26
Q

When copper combines with oxygen to form copper (II) oxide, the charge of the copper ion is __

A

Cu2+

27
Q

It is possible for different covalent compounds to have the same empirical formula because empirical formulas represent __

A

a ration of atoms in the compound

28
Q

How many chemical bonds can carbon form with other atoms?

A

4

29
Q

Alkanes are hydrocarbons that contain __

A

single covalent bonds only

30
Q

When two atoms bond, the positive __ of one atom attracts the negative __ of another

A

nucleus; electron

31
Q

When two chlorine atoms bond, they __ a pair of electons

A

share

32
Q

A __ bond is formed when atoms share __ of electrons

A

covalent; pairs

33
Q

Because polyatomic ions are made of covalently bonded atoms that have either gained or lost electrons, they behave like simple __

A

ions

34
Q

A compound consisting of Cr3+ ions and OH- ions would be named __

A

chromium (III) hydroxide

35
Q

The chemical formula for the ionic compound consisting of oxide ions and nickel (III) ions is __

A

Ni2O3

36
Q

A compound’s __ formula tells you how many atoms of each type are in one molecule

A

molecular

37
Q

A __ is a polymer made of bonded amino acids

A

protein

Physical Science (2 decks)

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