QUESTION 64 F. The compound, BF3, has the Lewis structure as shown below: O TRUE O FALSE QUESTION 65 The Lewis structure for NH3 is: O H-N-H H O...

36.965

Question 32

Which of the following statements about subatomic particles best characterizes electrons?

1. positive charge, light, circling the nucleus
2. no charge, heavy, found in the nucleus
3. negative charge, light, circling the nucleus
4. negative charge, heavy, circling the nucleus

3 points 

Question 33

Henry Moseley determined that, with a few exceptions, the order of increasing atomic number is the same as increasing atomic mass.

1. TRUE
2. FALSE

2 points 

Question 34

Who was responsible for recognizing that the periodic table explained trends best when organized in order of atomic number?

1. Dmitri Mendeleev
2. Henry Moseley
3. JJ Thomson
4. Ernest Rutherford

3 points 

Question 35

Which selection contains elements that are all in the same period?

1. Rb, Sr, La, Zr
2. Al, Ga, Si, P
3. N, O, Cl, Br
4. Hg, Tl, Pb, Bi

3 points 

Question 36

Generally, when going from left to right across a period on the periodic table:

1. atomic radii decrease
2. ionic radii increase
3. electronegativity decreases
4. valence electron number decreases

3 points 

Question 37

Generally, when going down columns 1 or 2 of the periodic table, the reactivity of elements:

1. increases
2. decreases
3. remains the same except for noble gases
4. remains the same except for halogens

3 points 

Question 38

How many valence electrons are contained in Na, Mg, and Al respectively?

1. 1, 2, 3
2. 7, 6, 5
3. 9, 8, 7
4. 11, 12, 13

3 points 

Question 39

How many valence electrons are contained in N, O, and F, respectively?

1. 5, 6, 7
2. 7, 8, 9
3. 3, 2, 1
4. 14, 15, 18

3 points 

Question 40

The chemical symbol Si stands for silicone.

1. TRUE
2. FALSE

2 points 

Question 41The chemical symbol for potassium is P.

1. TRUE
2. FALSE

2 points 

Question 42

The element, boron, is represented by which of the following chemical symbols?

1. Be
2. Br
3. B
4. Ba

3 points 

Question 43

The chemical symbol, Na, represents the element:

1. Sodium
2. Nitrogen
3. Nadon
4. Lanthanum

3 points 

Question 44

The element, tungsten, is represented by which of the following chemical symbols?

1. W
2. T
3. Tu
4. Tn

3 points 

Question 45

Ions form when atoms gain or lose protons.

1. TRUE
2. FALSE

2 points 

Question 46

The proper name for Cu1+ is copper (I) ion.

1. TRUE
2. FALSE

2 points 

Question 47

Which of the following describes the anion in the compound MgO?

1. Mg1+
2. Mg2+
3. O1−
4. O2−

3 points 

Question 48

Which of the following describes the specific copper ion in the compound, CuCl?

1. Cupride ion
2. Copper (I) ion
3. Copper (II) ion
4. Cupride (I) ion

3 points 

Question 49

What is the charge of a potassium ion?

1. 2-
2. 1+
3. 3-
4. 3+

3 points 

Question 50

What is the charge of a sodium ion?

1. 3+
2. 2-
3. 2+
4. 1+

3 points 

Question 51

The name for the formula MgI2 is magnesium diiodide.

1. TRUE
2. FALSE

2 points 

Question 52

The proper name for CH4 is monocarbon tetrahydride.

1. TRUE
2. FALSE

2 points 

Question 53

The formula for silicon dioxide is:

1. SO2
2. SiO2
3. Si2O
4. S2O

3 points 

Question 54

The proper name for VO2 is:

1. Vanadium oxide
2. Vanadium (II) oxide
3. Vanadium (I) oxide
4. Vanadium (IV) oxide

3 points 

Question 55

The proper name for MnO is:

1. Magnesium oxide
2. Magnesium (II) oxide
3. Manganese oxide
4. Manganese (II) oxide

3 points 

Question 56

The proper name for C2H6 is:

1. Carbon hydride
2. Dicarbon heptahydride
3. Dicarbon tetrahydride
4. Dicarbon hexahydride

3 points 

Question 57

The sharing or transferring of outer valence electrons between atoms results in a chemical bond.

1. TRUE
2. FALSE

2 points 

Question 58

The bond exhibited between oxygen and hydrogen is an example of an ionic bond.

1. TRUE
2. FALSE

2 points 

Question 59The bond exhibited between two fluorine atoms is an example of an ionic bond.

1. TRUE
2. FALSE

2 points 

Question 60

Which of the following pairs of atoms exhibit an ionic bond?

1. H and S
2. Fe and O
3. C and F
4. C and N

3 points 

Question 61

Which of the following pairs of atoms do NOT exhibit an ionic bond?

1. Cl and Al
2. Cl and B
3. Ca and F
4. Rb and S

3 points 

Question 62

Which of the following pairs of atoms do NOT exhibit a covalent bond?

1. Cs and F
2. O and O
3. S and O
4. P and Cl

3 points 

Question 63

The Lewis structure of HCl has a double-bond.

1. TRUE
2. FALSE

2 points 

Question 64

The compound, BF3, has the Lewis structure as shown below:    

1. TRUE
2. FALSE

65, 66, 67, 68, 69 are pictured

Question 70

Which functional groups are involved in an amino acid?

• Attachment 1
• Attachment 2
• Attachment 3

QUESTION 64F.The compound, BF3, has the Lewis structure as shown below:B: F:O TRUEO FALSEQUESTION 65The Lewis structure for NH3 is:OH-N-HHO H-N-HHOH-N-HHOH-N-HHQUESTION 66The Lewis structure for N2 is:O :N = N:O:N =:Z:O:NN:O