Question 1

What is the charge on the In in the ionic compound In2Te3?

Accepted Answer

A) 2- 
B) 1+ 
C) 2+ 
D) 3+ 
A) 2- 
B) 1+ 
C) 2+ 
D) 3+ D

Question 2

How many electrons are in a neutral atom of iodine-131?

Accepted Answer

A) 1 
B) 53 
C) 54 
D) 131 
A) 1 
B) 53 
C) 54 
D) 131 B

Question 3

The number of electrons in the ion Ca2+ is ________.

Accepted Answer

18

Question 4

Which of the following elements is a good conductor of heat and electricity?

Accepted Answer

A) silicon 
B) iodine 
C) radon 
D) lead 
A) silicon 
B) iodine 
C) radon 
D) lead

Question 5

Elements in a periodic group have similar

Accepted Answer

A) chemical properties. 
B) densities. 
C) masses. 
D) physical properties. 
A) chemical properties. 
B) densities. 
C) masses. 
D) physical properties.

Question 6

What is the chemical formula for iron(II)phosphate?

Accepted Answer

A) Fe2P 
B) Fe2PO4 
C) Fe3P4 
D) Fe3(PO4)2 
A) Fe2P 
B) Fe2PO4 
C) Fe3P4 
D) Fe3(PO4)2

Question 7

Assume that the mixture of substances in drawing (1)undergoes a chemical reaction.Which of the drawings (2)-(4)represents a product mixture that is consistent with the law of mass conservation?

Accepted Answer

A) drawing (2) 
B) drawing (3) 
C) drawing (4) 
A) drawing (2) 
B) drawing (3) 
C) drawing (4)

Question 8

Which of the compounds,Ca H2,H2O ,C H4,XeF4 are ionic compounds?

Accepted Answer

A) only C H4 
B) only Ca H2 
C) Ca H2 and Xe F4 
D) H2O ,C H4,and XeF4 
A) only C H4 
B) only Ca H2 
C) Ca H2 and Xe F4 
D) H2O ,C H4,and XeF4

Question 9

The symbol of the isotope having Z = 88 and A = 226 is ________.

Accepted Answer

The answer of The symbol of the isotope having Z...

Question 10

Which subatomic particle has the smallest mass?

Accepted Answer

A) a proton 
B) a neutron 
C) an electron 
D) an alpha particle 
A) a proton 
B) a neutron 
C) an electron 
D) an alpha particle

Question 11

Mendeleev arranged the elements according to

Accepted Answer

A) atomic number and atomic weight. 
B) atomic weight and chemical reactivity. 
C) electron configuration and atomic weight. 
D) physical state and relative abundance. 
A) atomic number and atomic weight. 
B) atomic weight and chemical reactivity. 
C) electron configuration and atomic weight. 
D) physical state and relative abundance.

Question 12

The solid compound,Na4SiO4,contains

Accepted Answer

A) Na+,Si4+,and O2- ions. 
B) Na+ ions and SiO44- ions. 
C) Na4+ and SiO44- ions. 
D) Na4SiO4 molecules. 
A) Na+,Si4+,and O2- ions. 
B) Na+ ions and SiO44- ions. 
C) Na4+ and SiO44- ions. 
D) Na4SiO4 molecules.

Question 13

According to the law of multiple proportions,if 12 g of carbon combine with 16 g of oxygen to form CO,the number of grams of carbon that combine with 16 g of oxygen in the formation of CO2 is ________.

Accepted Answer

Question 14

A sample of pure lithium carbonate contains 18.8% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A) 9.40% 
B) 18.8% 
C) 37.6% 
D) 75.2% 
A) 9.40% 
B) 18.8% 
C) 37.6% 
D) 75.2%

Question 15

Which element indicated by letter in the following periodic table reacts rapidly with water to form an alkaline solution?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 16

The chemical formula for the carbonate ion is

Accepted Answer

A) C-. 
B) CO-. 
C) CO32-. 
D) CO22-. 
A) C-. 
B) CO-. 
C) CO32-. 
D) CO22-.

Question 17

24.0 g of which element contains the greatest number of atoms?

Accepted Answer

A) Be 
B) C 
C) O 
D) Na 
A) Be 
B) C 
C) O 
D) Na

Question 18

The chemical formula for chlorous acid is

Accepted Answer

A) H ClO(aq). 
B) H ClO2(aq). 
C) H ClO3(aq). 
D) H Cl O4(aq). 
A) H ClO(aq). 
B) H ClO2(aq). 
C) H ClO3(aq). 
D) H Cl O4(aq).

Question 19

Three atoms have the following properties.   The elements Y and Z are best described as

Accepted Answer

A) isotopes. 
B) cations. 
C) different elements. 
D) anions. 
A) isotopes. 
B) cations. 
C) different elements. 
D) anions.

Question 20

Most of the alpha particles directed at a thin gold foil in Rutherford's experiment

Accepted Answer

A) bounced directly back from the foil. 
B) passed directly through the foil undeflected. 
C) passed through the foil but were deflected at an angle. 
D) were absorbed by the foil. 
A) bounced directly back from the foil. 
B) passed directly through the foil undeflected. 
C) passed through the foil but were deflected at an angle. 
D) were absorbed by the foil.

Exam 2: Atoms, molecules, and Ions

What is the charge on the In in the ionic compound In2Te3?

How many electrons are in a neutral atom of iodine-131?

The number of electrons in the ion Ca2+ is ________.

Which of the following elements is a good conductor of heat and electricity?

Elements in a periodic group have similar

What is the chemical formula for iron(II)phosphate?

Assume that the mixture of substances in drawing (1)undergoes a chemical reaction.Which of the drawings (2)-(4)represents a product mixture that is consistent with the law of mass conservation?

Which of the compounds,Ca H2,H2O ,C H4,XeF4 are ionic compounds?

The symbol of the isotope having Z = 88 and A = 226 is ________.

Which subatomic particle has the smallest mass?

Mendeleev arranged the elements according to

The solid compound,Na4SiO4,contains

According to the law of multiple proportions,if 12 g of carbon combine with 16 g of oxygen to form CO,the number of grams of carbon that combine with 16 g of oxygen in the formation of CO2 is ________.

A sample of pure lithium carbonate contains 18.8% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Which element indicated by letter in the following periodic table reacts rapidly with water to form an alkaline solution?

The chemical formula for the carbonate ion is

24.0 g of which element contains the greatest number of atoms?

The chemical formula for chlorous acid is

Three atoms have the following properties. The elements Y and Z are best described as

Most of the alpha particles directed at a thin gold foil in Rutherford's experiment

Chemical Tools: Experimentation and Measurement

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

What is the charge on the In in the ionic compound In₂Te₃?

The number of electrons in the ion Ca²⁺ is ________.

Which of the compounds,CaH₂,H₂O,CH₄,XeF₄ are ionic compounds?

The solid compound,Na₄SiO₄,contains

According to the law of multiple proportions,if 12 g of carbon combine with 16 g of oxygen to form CO,the number of grams of carbon that combine with 16 g of oxygen in the formation of CO₂ is ________.