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Chemistry 103 pt 1

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Quiz on Chemistry 103 pt 1, created by wtjf27 on 01/05/2014.
wtjf27
Quiz by wtjf27, updated more than 1 year ago
wtjf27
Created by wtjf27 almost 10 years ago
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Resource summary

Question 1

Question
Tin is atomic number 50. The means that all tin atoms have?
Answer
  • 50 protons in the nucleus
  • 50 neutrons in nucleus
  • 50 electrons

Question 2

Question
After the 4s subshell of an atom is filled with electrons, the next electron added will enter the
Answer
  • 3d subshell
  • 4d subshell
  • 4p subshell

Question 3

Question
In which of the following pairs of elements are both members of the pair metals?
Answer
  • P and O
  • Nb and Ar
  • Ag and Bi

Question 4

Question
The modern periodic table arranges the elements in order of
Answer
  • year of discovery
  • reactivity with oxygen
  • increasing number of protons

Question 5

Question
Isotopes of a given element ________
Answer
  • have the same mass number but different numbers of protons
  • have different mass numbers but identical numbers of protons
  • have the same mass number but different chemical properties

Question 6

Question
In which of the following measure numbers are all of the zeros significant
Answer
  • 0.0705
  • 0.000440
  • 3.945900

Question 7

Question
What is the mass, in grams, of 30.7 mL of a liquid if its density is 0.81 g/mL?
Answer
  • 25 g
  • 3.8 g
  • 38 g

Question 8

Question
If the temperature of an object is 435 degrees C what is the temp on a Kelvin scale?
Answer
  • 162 K
  • 708 K
  • 608 K

Question 9

Question
A 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?
Answer
  • 1.796 g/mL
  • 26.83 g/mL
  • 19.3 g/mL

Question 10

Question
Express 4.5 x 10^4 liters in milliliters
Answer
  • 4.5 x 10^3
  • 4.5 x 10^7
  • 4.5 x 10^6

Question 11

Question
Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?
Answer
  • 94.9 mL
  • 0.0443 mL
  • 22.6 mL

Question 12

Question
Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?
Answer
  • 94.9 mL
  • 0.0443 mL
  • 22.6 mL

Question 13

Question
The density of table sugar is 1.59 g/mL. What is the mass if you have 3.14 mL?
Answer
  • 0.501 g
  • 1.98 g
  • 4.99 g

Question 14

Question
In which of the following pairs of properties are both properties chemical properties?
Answer
  • freezes at 10 degrees C and nonflammable
  • decomposes at 500 degrees C and reacts with bromine
  • poor conductor of heat and is reddish brown in color

Question 15

Question
In which of the following pairs of measured numbers does each member of the pair contain the same number of sig figs?
Answer
  • 10.3 and 10.30
  • 800.0 and 80
  • 0.000096 and 960.000

Question 16

Question
The measurement 8310.90 expressed in scientific notation becomes
Answer
  • 8.3109 x 10^4
  • 8.3109 x 10^2
  • 8.3109 x 10^3

Question 17

Question
The density of an object is the ratio of its
Answer
  • length to volume
  • mass to volume
  • mass to height

Question 18

Question
The density of an object is the ratio of its
Answer
  • length to volume
  • mass to volume
  • mass to height

Question 19

Question
In which of the following sequences of elements do all members of the sequence have chemical symbols starting with the same letter?
Answer
  • sulfur, silicon, sodium
  • gold, silver, aluminum
  • potassium, phosphorus, lead

Question 20

Question
Which of the following changes is a chemical change?
Answer
  • melting of ice
  • pulverizing of hard sugar cubes
  • rusting of iron

Question 21

Question
Which of the following changes is a chemical change?
Answer
  • melting of ice
  • pulverizing of hard sugar cubes
  • rusting of iron

Question 22

Question
Your sweetheart gives you 1.25 lb. of Seattle's Chocolates for Valentine's Day. How much is this in grams?
Answer
  • 908 g
  • 568 g
  • 363 g

Question 23

Question
This states that any compound is always made up of elements in the same proportion by mass.
Answer
  • Dalton's Atomic Theory
  • Octet Rule
  • Law of Definite Composition

Question 24

Question
An element is a substance that
Answer
  • can be broken down into simpler substances by physical means
  • cannot be broken down by chemical or physical means
  • can be broken down by chemical means

Question 25

Question
The description "two substances present, two phases present" is correct for
Answer
  • heterogeneous mixtures
  • homegeneous mixtures
  • elements

Question 26

Question
Electrons in an orbital always-
Answer
  • spin in the same direction
  • are neutral
  • spin in opposite direction

Question 27

Question
Group 11A is the
Answer
  • alkaline earth metals
  • Halogens
  • Noble Gases

Question 28

Question
Which of the following elements is a metalloid?
Answer
  • Si
  • Pb
  • Al

Question 29

Question
A substance has a freezing point of -20 degrees C. This is an example of a:
Answer
  • Physical property
  • chemical property
  • physical change

Question 30

Question
What is true about metal elements to nonmetal elements?
Answer
  • more nonmentals than metals
  • more metals than nonmetals
  • there are no nonmetals

Question 31

Question
Matter is neither created nor destryoed:
Answer
  • Octet Rule
  • Dalton's Atomic Theory
  • Law of Conservation of Matter

Question 32

Question
Elements in groups 1A and 11A are referred to as the?
Answer
  • p-block elements
  • d-block elements
  • s-block elements

Question 33

Question
What subatomic particles are found in the nucleus?
Answer
  • proton and electrons
  • protons
  • neutrons and protons

Question 34

Question
Express the length 3.22 mm in centimeters.
Answer
  • 3.22 cm
  • 322 cm
  • 0.322 cm

Question 35

Question
What are the horizontal rows of the periodic table called?
Answer
  • Group
  • Periods
  • Families

Question 36

Question
The properties of ductility, malleability, ability to conduct heat and electron characteristics of what type of materials ?
Answer
  • All Elements
  • Metallic Elements
  • Metalloids Elements

Question 37

Question
Nonmetallic elements This term used to describe how consistently several measurements of some quantity give the same result is?
Answer
  • Exactness
  • Accuracy
  • Precision

Question 38

Question
An atom contains 33 protons, 35 neutrons and 33 electrons. The atomic number and mass number for the atoms are, respectively.
Answer
  • 35 and 33
  • 33 and 35
  • 33 and 68

Question 39

Question
In which of the following sequences of elements does each of the elements have a two-letter chemical symbol.
Answer
  • Barium, iron, nitrogen
  • Silicon, zinc, hydrogen
  • Selenium, nickel strontium
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