Question 1

Based on the position in the periodic table, which of the following is classified as a non metal?

Accepted Answer

A)  Boron 
B)  Lithium 
C)  Vanadium 
D)  Aluminum 
E)  Tin 
A)  Boron 
B)  Lithium 
C)  Vanadium 
D)  Aluminum 
E)  Tin

Question 2

The major constituents of air are nitrogen (78%), oxygen (21%), carbon dioxide (0.5%), and inert gases. The number of particles present in one volume of air is _____ the number of particles in one volume of pure oxygen.

Accepted Answer

A)  equal to 
B)  four times greater than 
C)  79 times greater than 
D)  21% lesser than 
E)  one fourth 
A)  equal to 
B)  four times greater than 
C)  79 times greater than 
D)  21% lesser than 
E)  one fourth

Question 3

_____ observations describe properties or occurrences in ways that do not rely on numbers.

Accepted Answer

The answer of _____ observations describe properties or occurrences in...

Question 4

Cathode rays consist of a stream of helium nuclei.

Accepted Answer

A) True 
 B)False

Question 5

According to Avogadro's hypothesis the number of atoms in one volume of hydrogen (H2) gas is _____ the number of atoms in one volume of ammonia (NH3) gas.

Accepted Answer

A)  half 
B)  equal to 
C)  double 
D)  three times 
E)  one fourth 
A)  half 
B)  equal to 
C)  double 
D)  three times 
E)  one fourth

Question 6

We can assess the precision of a set of measurements by calculating the _____ of the measurements.

Accepted Answer

The answer of We can assess the precision of a...

Question 7

The symbol for sodium is Si.

Accepted Answer

A) True 
 B)False

Question 8

Scientists can measure relative atomic masses very accurately, however, using an instrument called a _____.

Accepted Answer

The answer of Scientists can measure relative atomic masses very...

Question 9

According to Avogadro's hypothesis, one volume of hydrogen reacts with one volume of bromine to give two volumes of hydrogen bromide.

Accepted Answer

A) True 
 B)False

Question 10

A _____ contains two or more elements and has chemical and physical properties that are usually different from those of the elements of which it is composed.

Accepted Answer

The answer of A _____ contains two or more elements...

Question 11

Which of the following elements is classified as an alkali metal?

Accepted Answer

A)  Copper 
B)  Chlorine 
C)  Cesium 
D)  Chromium 
E)  Cadmium 
A)  Copper 
B)  Chlorine 
C)  Cesium 
D)  Chromium 
E)  Cadmium

Question 12

Distinguish metals from nonmetals.

Accepted Answer

The distinction between metals and nonme

Question 13

K is the symbol for _____.

Accepted Answer

The answer of K is the symbol for _____....

Question 14

Atmospheric air is an example of a heterogeneous mixture.

Accepted Answer

A) True 
 B)False

Question 15

Most non-metal solids are lustrous.

Accepted Answer

A) True 
 B)False

Question 16

The number of atoms in a volume of hydrogen chloride will equal the number of atoms in a volume of chlorine.

Accepted Answer

A) True 
 B)False

Question 17

In Rutherford's experiment α particles aimed directly at the nuclei of gold atoms were deflected by the greatest angle.

Accepted Answer

A) True 
 B)False

Question 18

The measured number of significant figures in 0.037 is _____.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  300 
E)  infinite 
A)  1 
B)  2 
C)  3 
D)  300 
E)  infinite

Question 19

Which of the following is a property associated with noble gases?

Accepted Answer

A)  Lustrous nature 
B)  Malleability 
C)  Ductile nature 
D)  Inertness 
E)  Salt formation 
A)  Lustrous nature 
B)  Malleability 
C)  Ductile nature 
D)  Inertness 
E)  Salt formation

Question 20

An alpha particle consists off:

Accepted Answer

A)  two electrons and a neutron. 
B)  two electrons and a proton. 
C)  two neutrons and two protons. 
D)  two neutrons and two electrons. 
E)  two neutrons, a proton and a neutron. 
A)  two electrons and a neutron. 
B)  two electrons and a proton. 
C)  two neutrons and two protons. 
D)  two neutrons and two electrons. 
E)  two neutrons, a proton and a neutron.

Exam 1: Introduction to Chemistry

Based on the position in the periodic table, which of the following is classified as a non metal?

The major constituents of air are nitrogen (78%), oxygen (21%), carbon dioxide (0.5%), and inert gases. The number of particles present in one volume of air is _____ the number of particles in one volume of pure oxygen.

_____ observations describe properties or occurrences in ways that do not rely on numbers.

Cathode rays consist of a stream of helium nuclei.

According to Avogadro's hypothesis the number of atoms in one volume of hydrogen (H2) gas is _____ the number of atoms in one volume of ammonia (NH3) gas.

We can assess the precision of a set of measurements by calculating the _____ of the measurements.

The symbol for sodium is Si.

Scientists can measure relative atomic masses very accurately, however, using an instrument called a _____.

According to Avogadro's hypothesis, one volume of hydrogen reacts with one volume of bromine to give two volumes of hydrogen bromide.

A _____ contains two or more elements and has chemical and physical properties that are usually different from those of the elements of which it is composed.

Which of the following elements is classified as an alkali metal?

Distinguish metals from nonmetals.

K is the symbol for _____.

Atmospheric air is an example of a heterogeneous mixture.

Most non-metal solids are lustrous.

The number of atoms in a volume of hydrogen chloride will equal the number of atoms in a volume of chlorine.

In Rutherford's experiment α particles aimed directly at the nuclei of gold atoms were deflected by the greatest angle.

The measured number of significant figures in 0.037 is _____.

Which of the following is a property associated with noble gases?

An alpha particle consists off:

Molecules, Ions, and Chemical Formulas

Chemical Reactions

Reactions in Aqueous Solution

Energy Changes in Chemical Reactions

The Structure of Atoms

The Periodic Table and Periodic Trends

Ionic Versus Covalent Bonding

Molecular Geometry and Covalent Bonding Models

Gases

Liquids

Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Acidbase Equilibriums

Solubility and Complexation Equilibriums

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Periodic Trends and the S-Block Elements

The P-Block Elements

The D-Block Elements

Organic Compounds

Filters

According to Avogadro's hypothesis the number of atoms in one volume of hydrogen (H₂) gas is _____ the number of atoms in one volume of ammonia (NH₃) gas.