Test
Chemistry 103 pt 1
Preguntas del test (39)
1Tin is atomic number 50. The means that all tin atoms have?
- A50 protons in the nucleus
- B50 neutrons in nucleus
- C50 electrons
2After the 4s subshell of an atom is filled with electrons, the next electron added will enter the
- A3d subshell
- B4d subshell
- C4p subshell
3In which of the following pairs of elements are both members of the pair metals?
- AP and O
- BNb and Ar
- CAg and Bi
4The modern periodic table arranges the elements in order of
- Ayear of discovery
- Breactivity with oxygen
- Cincreasing number of protons
5Isotopes of a given element ________
- Ahave the same mass number but different numbers of protons
- Bhave different mass numbers but identical numbers of protons
- Chave the same mass number but different chemical properties
6In which of the following measure numbers are all of the zeros significant
- A0.0705
- B0.000440
- C3.945900
7What is the mass, in grams, of 30.7 mL of a liquid if its density is 0.81 g/mL?
- A25 g
- B3.8 g
- C38 g
8If the temperature of an object is 435 degrees C what is the temp on a Kelvin scale?
- A162 K
- B708 K
- C608 K
9A sample of the element calcium weighing 42.923 grams was dropped in a graduated cylinder containing 22.30 mL of water. The volume of the water plus the sample was 23.90 mL. What is the density of calcium?
- A1.796 g/mL
- B26.83 g/mL
- C19.3 g/mL
10Express 4.5 x 10^4 liters in milliliters
- A4.5 x 10^3
- B4.5 x 10^7
- C4.5 x 10^6
11Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?
- A94.9 mL
- B0.0443 mL
- C22.6 mL
12Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?
- A94.9 mL
- B0.0443 mL
- C22.6 mL
13The density of table sugar is 1.59 g/mL. What is the mass if you have 3.14 mL?
- A0.501 g
- B1.98 g
- C4.99 g
14In which of the following pairs of properties are both properties chemical properties?
- Afreezes at 10 degrees C and nonflammable
- Bdecomposes at 500 degrees C and reacts with bromine
- Cpoor conductor of heat and is reddish brown in color
15In which of the following pairs of measured numbers does each member of the pair contain the same number of sig figs?
- A10.3 and 10.30
- B800.0 and 80
- C0.000096 and 960.000
16The measurement 8310.90 expressed in scientific notation becomes
- A8.3109 x 10^4
- B8.3109 x 10^2
- C8.3109 x 10^3
17The density of an object is the ratio of its
- Alength to volume
- Bmass to volume
- Cmass to height
18The density of an object is the ratio of its
- Alength to volume
- Bmass to volume
- Cmass to height
19In which of the following sequences of elements do all members of the sequence have chemical symbols starting with the same letter?
- Asulfur, silicon, sodium
- Bgold, silver, aluminum
- Cpotassium, phosphorus, lead
20Which of the following changes is a chemical change?
- Amelting of ice
- Bpulverizing of hard sugar cubes
- Crusting of iron
21Which of the following changes is a chemical change?
- Amelting of ice
- Bpulverizing of hard sugar cubes
- Crusting of iron
22Your sweetheart gives you 1.25 lb. of Seattle's Chocolates for Valentine's Day. How much is this in grams?
- A908 g
- B568 g
- C363 g
23This states that any compound is always made up of elements in the same proportion by mass.
- ADalton's Atomic Theory
- BOctet Rule
- CLaw of Definite Composition
24An element is a substance that
- Acan be broken down into simpler substances by physical means
- Bcannot be broken down by chemical or physical means
- Ccan be broken down by chemical means
25The description "two substances present, two phases present" is correct for
- Aheterogeneous mixtures
- Bhomegeneous mixtures
- Celements
26Electrons in an orbital always-
- Aspin in the same direction
- Bare neutral
- Cspin in opposite direction
27Group 11A is the
- Aalkaline earth metals
- BHalogens
- CNoble Gases
28Which of the following elements is a metalloid?
- ASi
- BPb
- CAl
29A substance has a freezing point of -20 degrees C. This is an example of a:
- APhysical property
- Bchemical property
- Cphysical change
30What is true about metal elements to nonmetal elements?
- Amore nonmentals than metals
- Bmore metals than nonmetals
- Cthere are no nonmetals
31Matter is neither created nor destryoed:
- AOctet Rule
- BDalton's Atomic Theory
- CLaw of Conservation of Matter
32Elements in groups 1A and 11A are referred to as the?
- Ap-block elements
- Bd-block elements
- Cs-block elements
33What subatomic particles are found in the nucleus?
- Aproton and electrons
- Bprotons
- Cneutrons and protons
34Express the length 3.22 mm in centimeters.
- A3.22 cm
- B322 cm
- C0.322 cm
35What are the horizontal rows of the periodic table called?
- AGroup
- BPeriods
- CFamilies
36The properties of ductility, malleability, ability to conduct heat and electron characteristics of what type of materials ?
- AAll Elements
- BMetallic Elements
- CMetalloids Elements
37Nonmetallic elements This term used to describe how consistently several measurements of some quantity give the same result is?
- AExactness
- BAccuracy
- CPrecision
38An atom contains 33 protons, 35 neutrons and 33 electrons. The atomic number and mass number for the atoms are, respectively.
- A35 and 33
- B33 and 35
- C33 and 68
39In which of the following sequences of elements does each of the elements have a two-letter chemical symbol.
- ABarium, iron, nitrogen
- BSilicon, zinc, hydrogen
- CSelenium, nickel strontium
Información
- Descripción
- Test sobre Chemistry 103 pt 1, creado por wtjf27 el 01/05/2014.
- Autor
- wtjf27
- Idioma
- English
- Visitas
- 122
- Valoración
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