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Quiz on Chemistry 103 pt 1, created by wtjf27 on 01/05/2014.

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Chemistry 103 pt 1

Question 1 of 39

1

Tin is atomic number 50. The means that all tin atoms have?

Select one of the following:

  • 50 protons in the nucleus

  • 50 neutrons in nucleus

  • 50 electrons

Explanation

Question 2 of 39

1

After the 4s subshell of an atom is filled with electrons, the next electron added will enter the

Select one of the following:

  • 3d subshell

  • 4d subshell

  • 4p subshell

Explanation

Question 3 of 39

1

In which of the following pairs of elements are both members of the pair metals?

Select one of the following:

  • P and O

  • Nb and Ar

  • Ag and Bi

Explanation

Question 4 of 39

1

The modern periodic table arranges the elements in order of

Select one of the following:

  • year of discovery

  • reactivity with oxygen

  • increasing number of protons

Explanation

Question 5 of 39

1

Isotopes of a given element ________

Select one of the following:

  • 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

Explanation

Question 6 of 39

1

In which of the following measure numbers are all of the zeros significant

Select one of the following:

  • 0.0705

  • 0.000440

  • 3.945900

Explanation

Question 7 of 39

1

What is the mass, in grams, of 30.7 mL of a liquid if its density is 0.81 g/mL?

Select one of the following:

  • 25 g

  • 3.8 g

  • 38 g

Explanation

Question 8 of 39

1

If the temperature of an object is 435 degrees C what is the temp on a Kelvin scale?

Select one of the following:

  • 162 K

  • 708 K

  • 608 K

Explanation

Question 9 of 39

1

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?

Select one of the following:

  • 1.796 g/mL

  • 26.83 g/mL

  • 19.3 g/mL

Explanation

Question 10 of 39

1

Express 4.5 x 10^4 liters in milliliters

Select one of the following:

  • 4.5 x 10^3

  • 4.5 x 10^7

  • 4.5 x 10^6

Explanation

Question 11 of 39

1

Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?

Select one of the following:

  • 94.9 mL

  • 0.0443 mL

  • 22.6 mL

Explanation

Question 12 of 39

1

Glass has a density of 2.05 g/mL. What is the volume of 46.3 grams of glass?

Select one of the following:

  • 94.9 mL

  • 0.0443 mL

  • 22.6 mL

Explanation

Question 13 of 39

1

The density of table sugar is 1.59 g/mL. What is the mass if you have 3.14 mL?

Select one of the following:

  • 0.501 g

  • 1.98 g

  • 4.99 g

Explanation

Question 14 of 39

1

In which of the following pairs of properties are both properties chemical properties?

Select one of the following:

  • 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

Explanation

Question 15 of 39

1

In which of the following pairs of measured numbers does each member of the pair contain the same number of sig figs?

Select one of the following:

  • 10.3 and 10.30

  • 800.0 and 80

  • 0.000096 and 960.000

Explanation

Question 16 of 39

1

The measurement 8310.90 expressed in scientific notation becomes

Select one of the following:

  • 8.3109 x 10^4

  • 8.3109 x 10^2

  • 8.3109 x 10^3

Explanation

Question 17 of 39

1

The density of an object is the ratio of its

Select one of the following:

  • length to volume

  • mass to volume

  • mass to height

Explanation

Question 18 of 39

1

The density of an object is the ratio of its

Select one of the following:

  • length to volume

  • mass to volume

  • mass to height

Explanation

Question 19 of 39

1

In which of the following sequences of elements do all members of the sequence have chemical symbols starting with the same letter?

Select one of the following:

  • sulfur, silicon, sodium

  • gold, silver, aluminum

  • potassium, phosphorus, lead

Explanation

Question 20 of 39

1

Which of the following changes is a chemical change?

Select one of the following:

  • melting of ice

  • pulverizing of hard sugar cubes

  • rusting of iron

Explanation

Question 21 of 39

1

Which of the following changes is a chemical change?

Select one of the following:

  • melting of ice

  • pulverizing of hard sugar cubes

  • rusting of iron

Explanation

Question 22 of 39

1

Your sweetheart gives you 1.25 lb. of Seattle's Chocolates for Valentine's Day. How much is this in grams?

Select one of the following:

  • 908 g

  • 568 g

  • 363 g

Explanation

Question 23 of 39

1

This states that any compound is always made up of elements in the same proportion by mass.

Select one of the following:

  • Dalton's Atomic Theory

  • Octet Rule

  • Law of Definite Composition

Explanation

Question 24 of 39

1

An element is a substance that

Select one of the following:

  • 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

Explanation

Question 25 of 39

1

The description "two substances present, two phases present" is correct for

Select one of the following:

  • heterogeneous mixtures

  • homegeneous mixtures

  • elements

Explanation

Question 26 of 39

1

Electrons in an orbital always-

Select one of the following:

  • spin in the same direction

  • are neutral

  • spin in opposite direction

Explanation

Question 27 of 39

1

Group 11A is the

Select one of the following:

  • alkaline earth metals

  • Halogens

  • Noble Gases

Explanation

Question 28 of 39

1

Which of the following elements is a metalloid?

Select one of the following:

  • Si

  • Pb

  • Al

Explanation

Question 29 of 39

1

A substance has a freezing point of -20 degrees C. This is an example of a:

Select one of the following:

  • Physical property

  • chemical property

  • physical change

Explanation

Question 30 of 39

1

What is true about metal elements to nonmetal elements?

Select one of the following:

  • more nonmentals than metals

  • more metals than nonmetals

  • there are no nonmetals

Explanation

Question 31 of 39

1

Matter is neither created nor destryoed:

Select one of the following:

  • Octet Rule

  • Dalton's Atomic Theory

  • Law of Conservation of Matter

Explanation

Question 32 of 39

1

Elements in groups 1A and 11A are referred to as the?

Select one of the following:

  • p-block elements

  • d-block elements

  • s-block elements

Explanation

Question 33 of 39

1

What subatomic particles are found in the nucleus?

Select one of the following:

  • proton and electrons

  • protons

  • neutrons and protons

Explanation

Question 34 of 39

1

Express the length 3.22 mm in centimeters.

Select one of the following:

  • 3.22 cm

  • 322 cm

  • 0.322 cm

Explanation

Question 35 of 39

1

What are the horizontal rows of the periodic table called?

Select one of the following:

  • Group

  • Periods

  • Families

Explanation

Question 36 of 39

1

The properties of ductility, malleability, ability to conduct heat and electron characteristics of what type of materials ?

Select one of the following:

  • All Elements

  • Metallic Elements

  • Metalloids Elements

Explanation

Question 37 of 39

1

Nonmetallic elements This term used to describe how consistently several measurements of some quantity give the same result is?

Select one of the following:

  • Exactness

  • Accuracy

  • Precision

Explanation

Question 38 of 39

1

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

Select one of the following:

  • 35 and 33

  • 33 and 35

  • 33 and 68

Explanation

Question 39 of 39

1

In which of the following sequences of elements does each of the elements have a two-letter chemical symbol.

Select one of the following:

  • Barium, iron, nitrogen

  • Silicon, zinc, hydrogen

  • Selenium, nickel strontium

Explanation

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