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Chemistry-Unit 2 Test
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Preguntas del test (50)
1How many solutions differ from heterogeneous mixtures?
- ASolutions have 2 or more phases
- BSolutions show the Tyndell effect
- CSolutions are homogeneous
- Dthere are no differences; they are synonymous
2Which technique is used to seperate ONLY heterogeneous mixtures?
- AChromatically
- BDistillation
- Celectricity
- Dfiltration
3Which of the following is a chemical property
- Aboliling water
- Bburning coal
- Cchopping onions
- Dslicing bread
4what is the symbol for potassium
- AK
- BP
- CPo
- DPt
5in which of these can the Tyndell effect be seen?
- AColloids
- BCompounds
- CElements
- DSolutions
6WHich of the Following is NOT a possible clue that a chemical reaction has occured?
- AChange of amount
- Bchange of color
- CPrecipitate formation
- DGas production
7Which of the following of the following is incorrectly labeled?
- ANe, nobel gas
- BCu, transition medal
- CGa, inner transition medal
- DCl, halogen
- ANe, nobel gas
8which of the following has a definite shape and a definite volume?
- AGas
- BLiquid
- Csolid
- Dvapor
9which of the following is a compound
- ACO
- BCo
- CNo
- DSn
10During any chemical change, the mass of the product is
- Aalways equal to the mass of the reactants
- Balways greater than the mass of the reactants
- Calways less than the mass of the reactants
- Dnot related to the mass of the reactants
11WHich element is matched with the INCORRECT symbol?
- ACarbon: C
- BLead: Pb
- CSulfur: S
- DTin: Tn
12What order do the elements follow in the modern periodic table?
- AColors
- Bmelting and boiling points
- Cincreasing atomic mass
- Dincreasing atomic number
13which properties can be observed without changing the composition of a substance?
- Aall properties of a substance
- Bchemical properties
- Cphysical properties
- Dno properties can be observed
14Which of the following is NOT a property of metals?
- ADuctility
- BMalleability
- CHigh luster
- Dpoor conduction of heat
15Which of the following is a mixture?
- Airon
- Bnitrogen
- Cstainless steel
- Dcarbon dioxide
16which of the following is a homogeneous mixture?
- AChicken noodle soup
- Biron filings in sand
- Cmuddy water
- Dvinegar
17in which directions does atomic size increase?
- ADown and left
- Bup and right
- Cdown and right
- Dup and left
18which of the following is not a metalloid?
- AAs
- BB
- CHe
- DSi
19Which of these do metals do?
- Again electrons to form cations
- Bgain electrons to form anions
- Close electrons to form cations
- Dlose electrons to form anions
20which of the following describes a mixture?
- Acomposition is fixed
- Belements chemically combined together
- Ccan be seperated by physical means
- Dalways has a single phase
21Which of the following is the most electronegative?
- ACl
- BSe
- CNa
- DI
22which of the following is an extensive property
- Acolor
- Bhardness
- Cmass
- Dtemperature
23which of these would be the largest in terms of atomic radius?
- ACl
- BSe
- CNa
- DCs
24which of the following statements about aubatomic particles is correct?
- Athe electron has the eatest mass
- Bprotons and neutrons have about the same mass
- Cprotons, electrons, and neutrons ave about the same mass
- Dprotons have the least mass
25what is the mass number of an isotope of thorium that has 142 neutrons
- A90
- B140
- C230
- D232
26In which directions does ionization energy generally increase?
- Adown and left
- Bup and right
- Cdown and right
- Dup and left
27which of the following pieces of information is usually not found on the periodic table?
- Acolor
- Bsymbol
- Catomic number
- Datomic mass
28anions generally form when electrons are...
- Agained by a metal
- Blost by a metal
- Cgained by a nonmetal
- Dlost by a nonmetal
29what are the charges of electrons, neutrons, and protons, respectively?
- A-1, 1, 0
- B1, 0, -1
- C-1, 0, 1
- D0, -1, 1
30which of these if NOT an alkali metal?
- AH
- BLi
- CNa
- DK
31How many valence electrons are in aluminum?
- A1
- B2
- C3
- D4
32if an element gains one electron, what charge would it have formed?
- A2
- B1
- C-1
- D-2
33In addition to the grouping the elements by properties, how did Mendeleev arrange the elements in his periodic table?
- AIncreasing atomic number
- BNumber of protons
- Cnumber of electrons
- Dincreasing atomic mass
34elements differ from one another in their identifies because they have different numbers of
- Aprotons
- Belectrons
- Cneutrons
- Dprotons & neutrons
35Which of these elements in the f block of the periodic table?
- ATe
- BTi
- CTl
- DTm
36What is responsible for changes in the trends across a period?
- AAtomic radius
- Belectron shielding
- Cionization energy
- Dnuclear charge
37which isotope would have 34 protons and 43 neutrons
- Aselenium-34
- Bselenium-77
- Ctechnetium-43
- Dtechnetium-77
38how many protons and neutrons are in nitrogen-15
- A7, 7
- B7, 8
- C7, 15
- D15, 8
39which of these is true of Rutherford's nuclear model of the atom?
- Apositive charge is evenly spread throughout the atom
- Bthe electrons occupy almost all the mass of an atom
- Cthe atom is mostly space
- Dthe neutrons are distributed around the nucleus
40how many neutrons in a gold-197 atom?
- A79
- B90
- C118
- D197
41which subatomic particles are found in the nucleus?
- Aelectrons and protons
- Bprotons and neutrons
- Cneutrons and electrons
- Dprotons, neutrons and electrons
42if an element has 40 protons, 40 electrons, and 50 neutrons, what is the isotope?
- Azinc-40
- Bzinc-90
- Czirconium-40
- Dzirconium-90
43which of these can be used to observe astons?
- Athe naked eye
- Ba magnifying glass
- Ca light microscope
- Da scanning tunneling electrons microscope
44which is the identity of the element in the pervious question?
- AO
- BP
- CS
- DGe
45how did dalton's atomic theory improve upon that of Democritus?
- Ait did not explain the chemical behavior of atoms
- Bit explained how subatomic particles were distributed in an atom
- Cit explained why atoms are electrically neutral
- Dit was based on experimental evidence
46What is the atomic mass of an element which he following masses and abundances? 31.972 (95.002%), 32.971(0.76%0, 33.967 (4.22%), and 35.967(0.014%)
- A3206
- B32.06
- C3.206
- D0.3206
47Which philosopher suggested that matter is made up of indivisible atoms?
- Aplato
- BAristotle
- CDemocritus
- Dsocrates
48which of these is NOT part of Dalton's atomic theory?
- Aall elements are composed of tiny particles called atoms
- Batoms of different elements can be physically mixed together or chemically combined
- Catoms of the same element are identical
- Din chemical reactions, atoms of one element are changed into atoms of another element
49which 3 elements fall in the same groups?
- AK, Ca, Sr
- BBa, La, Hf
- CB, Ga, Tl
- DN, O, F
50Identify the reactants in the following reactions: Li + Cl2= Mg + LiCl
- ALi and MgCl2
- BLi and Mg
- CMgCl2 and Mg
- DMg and LiCl
Información
- Descripción
- Test sobre Chemistry-Unit 2 Test, creado por cecooper16 el 17/12/2014.
- Autor
- cecooper16
- Idioma
- English
- Visitas
- 16
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