Question 1

The number of electrons in an atom is the same for all neutral atoms of that element.

Accepted Answer

A) True 
 B)False

Question 2

The correct name for V3+ is

Accepted Answer

A) vanadide 
B) vanadite ion 
C) vanadium(III)ion 
D) vanadium(V)ion 
E) trivanadium ion

Question 3

Write the formula for:
-phosphorus trichloride

Accepted Answer

The answer of Write the formula for:
-phosphorus trichloride...

Question 4

Many classic experiments have given us indirect evidence of the nature of the atom.Which of the experiments listed below did not give the results described?

Accepted Answer

A) The Rutherford experiment proved the Thomson "plum-pudding" model of the atom to be essentially correct. 
B) The Rutherford experiment was useful in determining the nuclear charge on the atom. 
C) Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the charge on the electron. 
D) The electric discharge tube proved that electrons have a negative charge. 
E) All of the above experiments gave the results described.

Question 5

How many protons and electrons does the most stable ion for oxygen have? # protons
# electrons

Accepted Answer

A) 10 p 8 e 
B) 8 p 6 e 
C) 6 p 8 e 
D) 8 p 8 e 
E) 8 p 10 e

Question 6

If the Thomson model of the atom had been correct,Rutherford would have observed:

Accepted Answer

A) Alpha particles going through the foil with little or no deflection. 
B) Alpha particles greatly deflected by the metal foil. 
C) Alpha particles bouncing off the foil. 
D) Positive particles formed in the foil. 
E) None of the above observations is consistent with the Thomson model of the atom.

Question 7

The first people to attempt to explain why chemical changes occur were

Accepted Answer

A) alchemists 
B) metallurgists 
C) physicians 
D) physicists 
E) the Greeks

Question 8

Name the following compounds: -K₂Cr₂O₇

Accepted Answer

The answer of Name the following compounds: -K₂Cr₂O₇...

Question 9

Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes.An atom of bromine-79 contains

Accepted Answer

A) 35 protons,44 neutrons,35 electrons 
B) 34 protons and 35 electrons,only 
C) 44 protons,44 electrons,and 35 neutrons 
D) 35 protons,79 neutrons,and 35 electrons 
E) 79 protons,79 electrons,and 35 neutrons

Question 10

The formula of water,H2O,suggests:

Accepted Answer

A) There is twice as much mass of hydrogen as oxygen in each molecule. 
B) There are two hydrogen atoms and one oxygen atom per water molecule. 
C) There is twice as much mass of oxygen as hydrogen in each molecule. 
D) There are two oxygen atoms and one hydrogen atom per water molecule. 
E) None of these.

Question 11

Which among the following represent a set of isotopes? Atomic nuclei containing:
I.20 protons and 20 neutrons
II.21 protons and 19 neutrons
III.22 neutrons and 18 protons
IV.20 protons and 22 neutrons
V.21 protons and 20 neutrons

Accepted Answer

A) I,II,III 
B) III,IV 
C) I,V 
D) I,IV and II,V 
E) No isotopes are indicated.

Question 12

The correct name for Ca2+ is

Accepted Answer

A) calcium 
B) calcium(II)ion 
C) calcium ion 
D) calcium(I)ion 
E) monocalcium ion

Question 13

Name the following compounds: -NH₄NO₃

Accepted Answer

The answer of Name the following compounds: -NH₄NO₃...

Question 14

How many oxygen atoms are there in 4 formula units of Al2(CO3)3?

Accepted Answer

A) 9 
B) 24 
C) 36 
D) 13 
E) 39

Question 15

The first scientist to show that atoms emit any negative particles was

Accepted Answer

A) J.J.Thomson 
B) Lord Kelvin 
C) Ernest Rutherford 
D) William Thomson 
E) John Dalton

Question 16

According to the law of multiple proportions:

Accepted Answer

A) If the same two elements form two different compounds,they do so in the same ratio. 
B) It is not possible for the same two elements to form more than one compound. 
C) The ratio of the masses of the elements in a compound is always the same. 
D) The total mass after a chemical change is the same as before the change. 
E) None of these.

Question 17

The formula for sodium dihydrogen phosphate is

Accepted Answer

A) NaH2PO4 
B) Na(HPO4)2 
C) NaHPO4 
D) Na2HPO4 
E) Na2H2PO4

Question 18

The correct name for FeO is

Accepted Answer

A) iron oxide 
B) iron(II)oxide 
C) iron(III)oxide 
D) iron monoxide 
E) iron(I)oxide

Question 19

Which of the following are incorrectly paired?

Accepted Answer

A) Copper,Cu 
B) Carbon,C 
C) Cobalt,Co 
D) Calcium,Ca 
E) Cesium,Ce

Question 20

Write the symbol for each of the following elements.
a)
silver
_____________
b)
calcium
_____________
c)
iodine
_____________
d)
copper
_____________
e)
phosphorus
_____________

Accepted Answer

The answer of Write the symbol for each of the...

Exam 2: Atoms, molecules, and Ions

The number of electrons in an atom is the same for all neutral atoms of that element.

The correct name for V³⁺ is

Write the formula for: -phosphorus trichloride

Many classic experiments have given us indirect evidence of the nature of the atom.Which of the experiments listed below did not give the results described?

How many protons and electrons does the most stable ion for oxygen have? # protons # electrons

If the Thomson model of the atom had been correct,Rutherford would have observed:

The first people to attempt to explain why chemical changes occur were

Name the following compounds: -K₂Cr₂O₇

Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes.An atom of bromine-79 contains

The formula of water,H₂O,suggests:

Which among the following represent a set of isotopes? Atomic nuclei containing: I.20 protons and 20 neutrons II.21 protons and 19 neutrons III.22 neutrons and 18 protons IV.20 protons and 22 neutrons V.21 protons and 20 neutrons

The correct name for Ca²⁺ is

Name the following compounds: -NH₄NO₃

How many oxygen atoms are there in 4 formula units of Al₂(CO₃) ₃?

The first scientist to show that atoms emit any negative particles was

According to the law of multiple proportions:

The formula for sodium dihydrogen phosphate is

The correct name for FeO is

Which of the following are incorrectly paired?

Write the symbol for each of the following elements. a) silver _______ b) calcium _ c) iodine _ d) copper _ e) phosphorus _______

Exam 2: Atoms, molecules, and Ions

The number of electrons in an atom is the same for all neutral atoms of that element.

The correct name for V3+ is

Write the formula for: -phosphorus trichloride

Many classic experiments have given us indirect evidence of the nature of the atom.Which of the experiments listed below did not give the results described?

How many protons and electrons does the most stable ion for oxygen have? # protons # electrons

If the Thomson model of the atom had been correct,Rutherford would have observed:

The first people to attempt to explain why chemical changes occur were

Name the following compounds: -K2Cr2O7

Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes.An atom of bromine-79 contains

The formula of water,H2O,suggests:

Which among the following represent a set of isotopes? Atomic nuclei containing: I.20 protons and 20 neutrons II.21 protons and 19 neutrons III.22 neutrons and 18 protons IV.20 protons and 22 neutrons V.21 protons and 20 neutrons

The correct name for Ca2+ is

Name the following compounds: -NH4NO3

How many oxygen atoms are there in 4 formula units of Al2(CO3) 3?

The first scientist to show that atoms emit any negative particles was

According to the law of multiple proportions:

The formula for sodium dihydrogen phosphate is

The correct name for FeO is

Which of the following are incorrectly paired?

Write the symbol for each of the following elements. a) silver _____________ b) calcium _____________ c) iodine _____________ d) copper _____________ e) phosphorus _____________

The correct name for V³⁺ is

Name the following compounds: -K₂Cr₂O₇

The formula of water,H₂O,suggests:

The correct name for Ca²⁺ is

Name the following compounds: -NH₄NO₃

How many oxygen atoms are there in 4 formula units of Al₂(CO₃) ₃?

Write the symbol for each of the following elements. a) silver _______ b) calcium _ c) iodine _ d) copper _ e) phosphorus _______