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Chemistry Chapter 1 Connect Homework
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1Which of the following options correctly describes atoms? Select all that apply.
- AAn atom is the smallest unit of an element that can exist as a stable, independent entity
- BAtoms are extremely small
- CCompounds contain two or more different types of atoms
- DAtoms are divisible by ordinary chemical processes
- EElements are made up of several types of atoms
2Which of the following options correctly describe the periodic table? Select all that apply.
- AThe horizontal rows in the periodic table are called groups
- BThe elements in the periodic table are arranged based on similar chemical properties
- CThe periodic table includes compounds as well as elements
- DThe periodic table contained the chemical symbols that represent the elements
- EElements found on the left side of the periodic table are called nonmetals
3What group are Nobel gases apart of?
- AGroup 1
- BGroup 2
- CGroup 17
- DGroup 18
4What group are halogens apart of?
- AGroup 1
- BGroup 2
- CGroup 17
- DGroup 18
5What group are alkali metas apart of on the periodic table?
- AGroup 1
- BGroup 2
- CGroup 17
- DGroup 18
6What group are alkaline earth metals apart of on the periodic table?
- AGroup 1
- BGroup 2
- CGroup 17
- DGroup 18
7The number 10,000 can be expressed as 1 x 10^4. This second form is called ______ notation.
- AExponent
- BScientific
- CFactor of 10
- DCondensed
8Which of the following options correctly describes elements and compounds?
- AThe substance N2 is an example of a compound
- BThere are many more known compounds than elements
- CElements and compounds are both pure substances
- DA compounds contains two or more different elements
- EA compounds is a mixture
9Express 2.6 x 10^4 in decimal notation
- A260,000
- B260
- C26,000
- D26
10The periodic table is organized such that elements with similar ______ properties fall into vertical columns called ________.
- APhysical; groups
- BPhysical; periods
- CChemical; groups
- DChemical; periods
11Which of the following statements correctly describes subatomic particles? Select all that apply.
- AProtons are positively charged
- BThe mass of an electron is much smaller than the mass of a proton
- CA neutron is much heavier than a proton
- DThe electrons are located outside the nucleus of an atom
- EThe charge on a neutron is equal but opposite to the charge on a proton
12Elements in Group 17 are called [blank_start]_____________[blank_end] , whereas elements in Group 18 are called [blank_start]________[blank_end] gases.
- AHalogens
- Bnoble gases
13Which of the following statements correctly describe the atomic number of an element? Select all that apply.
- AThe atomic number of an element varies depending on the number of electrons present
- BThe atomic number is equal to the number of protons in the nucleus
- CThe atomic number equals the number of neutrons present in the atom
- DEach element has its own unique atomic number
14Scientific notation expresses a quantity with a single digit before the decimal point and followed by [blank_start]______[blank_end] raised to the appropriate power.
- A10
15Express the quantity 0.0000000000835 correctly in scientific notation.
- A8.35 x 10^11
- B8.35 x 10^-11
- C8.35 x 10^10
- D8.35 x 10^-10
16Which of the following are allotropes of oxygen?
- AO2
- BO3
- CCaO
- DCO2
17Each element has a unique number of ___________, which is called the atomic number. For a neutral atom, this number is also equal to the number of ___________ present.
- Aneutrons; protons
- BElectrons; protons
- CProtons; neutrons
- DProtons; electrons
18Most elements occur in nature as _____________.
- ASingle atoms
- BDiatomic molecules
- CCompounds
19Minerals are _____________________.
- AChemical compounds found in rocks and soil
- BComplex mixtures of metallic compounds
- CDiatomic molecules like N2
- DElemental forms of metal found in the earth
20Different forms of the same element (such as O2 and O3) are called ___________. These forms differ in the way atoms are bonded together.
- AAllotropes
- BIsotopes
- CIsotropes
- DIsomers
21Which of the following are common types of minerals found in rocks and soil? Select all that apply.
- ACarbides
- BNitrides
- COxides
- DSilicates
- EAluminates
22Which of the following options correctly describes the form(s) in which elements exist in nature? Select all that apply.
- ANonmetals such as oxygen and nitrogen may occur either in elemental form in the form of compounds
- BMost metals can be mined from the earth in their pure, elemental states
- CMany metals exist as compounds of oxygen, or oxides.
- DMost elements exist as diatomic molecules such as O2
23The composition of a mixture may be expressed as a percentage. Percent means parts per
- AHundred
- BBIllion
- CThousand
- DMillion
24Solid compounds of metals found in rocks and soil are called ________.
- AAllotropes
- BMineral
- COres
25Which of the following are examples of chemical change? Select all that apply.
- ARusting of iron
- BBoiling water
- CCutting aluminum foil
- DBurning a candle
26Many metals occur as minerals in rocks and soil. A mineral in which a metal is bonded to oxygen is called an [blank_start]________________[blank_end]. whereas a mineral containing oxygen and silicon together is called an [blank_start]________________[blank_end].
- Aoxcide
- Bsilicate
27Silicon is a key component of electronic devices. This element is an ___________, a type of element also called an ____________.
- AMetalloid; nonconductor
- BMetal; semiconductor
- CNonmetal; nonconductor
- DMetalloid; semiconductor
28If a mixture of quartz and bauxite contains 78% quartz, this means that ________. (Select all that apply).
- A200 g of this mixture contains 22g of bauxite
- BThere are 78g of quartz for every 100g of bauxite
- CThere are 78g of quartz for every 22g of bauxite
- D150g of this mixture contain 117g of quartz
- EThere are 78g of quartz in 100g of the mixture
29Which of the following are physical changes? (Select all that apply.)
- ATarnishing of silver
- BMelting ice
- CBreaking a bottle
- DBurning gasoline
30Which metalloid is a key component of electronic devices?
- AChromium
- BIron
- CSodium
- DSilver
- ESilicon
31Silica is a naturally occurring oxide of silicon, SiO2, which is transparent. Pure crystalized SiO2 is known as ___________.
- ASapphire
- BDiamond
- CGlass
- DQuartz
32Crystal is a solid that is ________________________________________________.
- ADisordered/random arrangement of constituent particles
- BHighly ordered arrangement of constituent particles
33Amorphous solids are _________________________________.
- AHighly ordered arrangement of constituent particles
- BDisordered/random arrangement of constituent particles
341 ppm is _____ times smaller than 1%
- A1000
- B100,000
- C10,000
- D1,000,000
35Silica glass is made by ________________.
- AHeating sand with acid to break the highly ordered structure so that it can harden and form glass when cooled
- BHeating sand to a temperature high enough to melt it and then cooling the liquid until it hardens
- CHeating graphite (carbon) at high temperature under high pressure
36Which of the following options correctly describe silica? Select all that apply.
- AQuartz is a form of silica
- BSilica is naturally occurring substance
- CPure silica is a highly colored substance
- DSilica is a form of pure, elemental silicon
- ESilica has a well-ordered structure composed of repeating linkages between Si and O
37A solid that has a highly ordered structure at the atomic level is referred to an an ___________, whereas solids with a relatively disordered structure are described as ________________.
- AGlass; entropic
- BGlass; amorphous
- CCrystal; entropic
- DCrystal; amorphous
38[blank_start]___________[blank_end] glass is strengthened glass that has been heated to high temperatures and cooled, which results in internal stresses.
- ATempured
39Which of the following elements are commonly added to sand when making glass, to improve thermal properties? Select all that apply.
- APotassium
- BChromium
- CAluminum
- DBaron
40An approach to analyzing the life cycle of an item, beginning with the raw materials from which it is made to its ultimate disposal, is called the ___________ approach.
- ACradle-to-grave
- BProduction/disposal
- CRecycling
41The process of quickly cooling molten glass has the effect of [blank_start]_____________[blank_end] the material.
- Astrengthening
42An approach to consumer goods that aims at recycling, so that the end of the life cycle of one item loads naturally into the beginning of the life cycle of another, is the __________ approach.
- ACradle-to-grave
- BRecycling
43The conversion of sand into high-purity silicon for computer chip fabrication would fall under which life cycle analysis for a laptop computer?
- AMaterial extraction and processing
- BLaptop fabrication
- CUse by consumers
- DRecycling and/or disposal
44What are the environmental challenges to extracting metals from recycled electronic devices? Select all that apply.
- AThe solvents used to remove the plastics are not generally environmentally friendly
- BContaminated groundwater could contribute to an increase of cancers in surrounding communities
- CThe process is very costly in energy, more so than mining the metals from the ground
- DGroundwater could be contaminated with heavy metals
45Which if the following form the focus of the cradle to grave approach to consumer goods? Select all that apply.
- AThe waste products created when the goods are made
- BProducts that can be made from the goods
- CThe raw materials from which the goods are made
- DThe energy consumed to produce the goods
46A "cradle-to-grave" approach to analysis of the life cycle of an item includes that ideas that ________________.
- AThe end of the life cycle of one item leads naturally into the beginning of the life cycle of another
- BThe end of the life cycle of an item can be defined precisely
- CThe life cycle of an item should be described in detail from its manufacture to its disposal
47Which of the following are essential parts of life cycle analysis? Select all that apply.
- AMarketing expenses
- BUse by consumers
- CResearch and development
- DRecycling and disposal
- EFabrication
48When an electronic device is recycled, the metals are recovered by ____________.
- ABoiling in solvents
- BTreatment with strong acid
- CCrushing the circuit boards and then filtering out the metals
- DPhysically picking them out with forceps
49Which of the following are elements? Select all that apply.
- ACaCo3
- BO2
- CNaCl
- DCu
- ENa
50Which of the following are examples of mixtures? Select all that apply.
- ANitrogen gas
- BArgon
- CCarbon dioxide
- DTap water
- ESoil
51Chemistry is the study of _______________. Select all the options that correctly complete the sentence.
- AThe properties of substances
- BThe interaction of living systems
- CThe changes of matter
- DMatter and its composition
52Which of the following are pure substances? Select all that apply.
- AH2O
- BN2
- CSalt water
53A molecule is an independent structure composed of two or more _____________ chemically bonded together.
- AAtoms
- BCompounds
- CElements
54Which of the following elements commonly occur as diatomic molecules? Select all that apply.
- AFluorine
- BHydrogen
- CNitrogen
- DOxygen
- ENeon
Informationen
- Beschreibung
- These connect homework questions are for the textbook "Chemistry in Context, Applying Chemistry to Society" 10th edition
- Autor
- Ana silverman
- Sprache
- English
- Aufrufe
- 1.418
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