Question 1

An element has the following electron arrangement.
shell 1:2 electrons shell 2: 8 electrons shell 3:18 electrons shell 4:18 electrons shell 5:7 electrons
The Lewis structure for this element would be:

Accepted Answer

A) True 
 B)False

Question 2

When a particular solid sample is examined under a microscope, it is observed that there are regions that are black and regions which are yellow. What type of matter is this sample?

Accepted Answer

A) a compound 
B) an element 
C) a homogeneous mixture 
D) a heterogeneous mixture

Question 3

Based on the text periodic table and using the correct number of significant figures, enter the appropriate number in the blank.
The mass of 5.00 mol of oxygen atoms is _____________g.

Accepted Answer

The answer of Based on the text periodic table and...

Question 4

An elements with an electron arrangement of:
shell 1:2 electrons shell 2:8 electrons shell 3:18 electrons shell 4: 18 electrons shell 5:7 electrons
would have 1 valence electron.

Accepted Answer

A) True 
 B)False

Question 5

Sodium is a highly reactive metal and chlorine is a toxic gas, but when they come together the resulting material, sodium chloride (a white solid), is essential for life. Which of the following is true when sodium and chlorine are brought into contact with one another?

Accepted Answer

A) They form a heterogeneous mixture. 
B) They form a homogenous mixture 
C) They form a new element. 
D) They form a compound.

Question 6

The image shown below represents an atomic view of a compound CsI.  What is the mass of one formula unit?

Accepted Answer

A) 259.8 g 
B) 259.8 amu 
C) 1.00 g 
D) 6.022 × 1023 amu

Question 7

Use the periodic table to determine about how many helium atoms (He) on the average would be needed to get close to the same mass as an oxygen atom (O).

Accepted Answer

A) 6 
B) 4 
C) 12 
D) 1/4

Question 8

Enter the chemical symbol in the blank for the element that has the electron arrangement given below.
shell 1: 2 electrons shell 2: 8 electrons shell 3: 5 electrons
Symbol for the element:
_____________________

Accepted Answer

The answer of Enter the chemical symbol in the blank...

Question 9

Use one the following terms to complete the given statement.
salt
sugar
vegetable oil
When ____________________ is added to water a heterogeneous mixture forms.

Accepted Answer

The answer of Use one the following terms to complete...

Question 10

Fill in each blank with the appropriate term from the list given below. protons neutrons electrons valence electrons -¹⁴N and ¹⁵O have the same number of _____________________.

Accepted Answer

The answer of Fill in each blank with the appropriate...

Question 11

Enter an integer number (1, 2, 3, ...) in the blank. Sucrose (table sugar) has the formula C₁₂H₂₂O₁₁. How many oxygen atoms would be in 3 formula units of sucrose? ____________________oxygen atoms.

Accepted Answer

The answer of Enter an integer number (1, 2, 3,...

Question 12

Which column of the periodic table is commonly called the halogens?

Accepted Answer

A) 1A 
B) 4A 
C) 7A 
D) 8A

Question 13

The atomic weight of phosphorus (P) is 30.91 amu or about 31 amu. This indicates that each P atom consists of 15 protons and 16 neutrons.

Accepted Answer

A) True 
 B)False

Question 14

The alkali metal found in period 2 is lithium.

Accepted Answer

A) True 
 B)False

Question 15

Elements in the same period of the periodic table generally show similar chemical behavior.

Accepted Answer

A) True 
 B)False

Question 16

What is the mass of one molecule of glucose, C6H12O6?

Accepted Answer

A) 29.02 amu 
B) 180.2 amu 
C) 29.02 g 
D) 180.2 g

Exam 2: Atoms, Elements, and Compounds

An element has the following electron arrangement. shell 1:2 electrons shell 2: 8 electrons shell 3:18 electrons shell 4:18 electrons shell 5:7 electrons The Lewis structure for this element would be:

When a particular solid sample is examined under a microscope, it is observed that there are regions that are black and regions which are yellow. What type of matter is this sample?

Based on the text periodic table and using the correct number of significant figures, enter the appropriate number in the blank. The mass of 5.00 mol of oxygen atoms is _____________g.

An elements with an electron arrangement of: shell 1:2 electrons shell 2:8 electrons shell 3:18 electrons shell 4: 18 electrons shell 5:7 electrons would have 1 valence electron.

Sodium is a highly reactive metal and chlorine is a toxic gas, but when they come together the resulting material, sodium chloride (a white solid) , is essential for life. Which of the following is true when sodium and chlorine are brought into contact with one another?

The image shown below represents an atomic view of a compound CsI. What is the mass of one formula unit?

Use the periodic table to determine about how many helium atoms (He) on the average would be needed to get close to the same mass as an oxygen atom (O) .

Enter the chemical symbol in the blank for the element that has the electron arrangement given below. shell 1: 2 electrons shell 2: 8 electrons shell 3: 5 electrons Symbol for the element: _____________________

Use one the following terms to complete the given statement. salt sugar vegetable oil When ____________________ is added to water a heterogeneous mixture forms.

Fill in each blank with the appropriate term from the list given below. protons neutrons electrons valence electrons -¹⁴N and ¹⁵O have the same number of _____________________.

Enter an integer number (1, 2, 3, ...) in the blank. Sucrose (table sugar) has the formula C₁₂H₂₂O₁₁. How many oxygen atoms would be in 3 formula units of sucrose? ____________________oxygen atoms.

Which column of the periodic table is commonly called the halogens?

The atomic weight of phosphorus (P) is 30.91 amu or about 31 amu. This indicates that each P atom consists of 15 protons and 16 neutrons.

The alkali metal found in period 2 is lithium.

Elements in the same period of the periodic table generally show similar chemical behavior.

What is the mass of one molecule of glucose, C₆H₁₂O₆?

Exam 2: Atoms, Elements, and Compounds

An element has the following electron arrangement. shell 1:2 electrons shell 2: 8 electrons shell 3:18 electrons shell 4:18 electrons shell 5:7 electrons The Lewis structure for this element would be:

When a particular solid sample is examined under a microscope, it is observed that there are regions that are black and regions which are yellow. What type of matter is this sample?

Based on the text periodic table and using the correct number of significant figures, enter the appropriate number in the blank. The mass of 5.00 mol of oxygen atoms is _____________g.

An elements with an electron arrangement of: shell 1:2 electrons shell 2:8 electrons shell 3:18 electrons shell 4: 18 electrons shell 5:7 electrons would have 1 valence electron.

Sodium is a highly reactive metal and chlorine is a toxic gas, but when they come together the resulting material, sodium chloride (a white solid) , is essential for life. Which of the following is true when sodium and chlorine are brought into contact with one another?

The image shown below represents an atomic view of a compound CsI. What is the mass of one formula unit?

Use the periodic table to determine about how many helium atoms (He) on the average would be needed to get close to the same mass as an oxygen atom (O) .

Enter the chemical symbol in the blank for the element that has the electron arrangement given below. shell 1: 2 electrons shell 2: 8 electrons shell 3: 5 electrons Symbol for the element: _____________________

Use one the following terms to complete the given statement. salt sugar vegetable oil When ____________________ is added to water a heterogeneous mixture forms.

Fill in each blank with the appropriate term from the list given below. protons neutrons electrons valence electrons -14N and 15O have the same number of _____________________.

Enter an integer number (1, 2, 3, ...) in the blank. Sucrose (table sugar) has the formula C12H22O11. How many oxygen atoms would be in 3 formula units of sucrose? ____________________oxygen atoms.

Which column of the periodic table is commonly called the halogens?

The atomic weight of phosphorus (P) is 30.91 amu or about 31 amu. This indicates that each P atom consists of 15 protons and 16 neutrons.

The alkali metal found in period 2 is lithium.

Elements in the same period of the periodic table generally show similar chemical behavior.

What is the mass of one molecule of glucose, C6H12O6?

Fill in each blank with the appropriate term from the list given below. protons neutrons electrons valence electrons -¹⁴N and ¹⁵O have the same number of _____________________.

Enter an integer number (1, 2, 3, ...) in the blank. Sucrose (table sugar) has the formula C₁₂H₂₂O₁₁. How many oxygen atoms would be in 3 formula units of sucrose? ____________________oxygen atoms.

What is the mass of one molecule of glucose, C₆H₁₂O₆?