Question 8 (5 points) Which of the following diatomic molecules is joined by a d

Question

Question 8 (5 points)

Which of the following diatomic molecules is joined by a double covalent bond?

Question 8 options:

N2

Cl2

O2

Question 9 (5 points)

Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 5 electron groups (2 bonds and 3 lone pair electrons).

Question 9 options:

trigonal bipyramidal, trigonal bipyramidal, 90° and 120°

trigonal bipyramidal, trigonal bipyramidal, 180°

trigonal bipyramidal, linear, 180°

Question 10 (5 points)

An _____ reaction results when the energy required to break bonds in the reactants is greater than the energy released by the formation of products.

Question 10 options:

exothermic

exergonic

endothermic

Question 11 (5 points)

Which of these elements tend to form ionic bonds with other elements?

Question 11 options:

Na, Ba, Al, Mg

Na, B, O, F

Na, Ba, Sr, Br

Question 12 (5 points)

What is the electron group (EG) and molecular geometry (MG) of an ammonia molecule?

Question 12 options:

(EG) tetrahedral and (MG) trigonal pyramidal

(EG) tetrahedral and (MG) bent

(EG) tetrahedral and (MG) tetrahedral

Question 13 (5 points)

According to the octet rule, a bromine atom has a tendency to

Question 13 options:

lose one electron.

lose two electrons.

gain one electron.

Question 14 (5 points)

Consider the molecule NH3. What are the bond angles in the structure?

Question 14 options:

109.5°

104.5°

107°

Question 15 (5 points)

What is the molecular shape and polarity for xenon tetrafluoride?

Question 15 options:

square-planar and polar

tetrahedral and non-polar

square-planar and non-polar

Question 16 (5 points)

Which of the following compounds is capable of covalent bonding?

Question 16 options:

K2SO4

NaCl

NF3

Question 17 (5 points)

Based off molecular polarity determined by VSEPR theory, which of the following would be soluble in methanol?

Question 17 options:

heptane

pentane

ethanol

Question 18 (5 points)

According to the octet rule, a magnesium atom has a tendency to

Question 18 options:

lose one electron.

lose two electrons.

gain one electron.

Question 19 (5 points)

According to the octet rule, which of elements will have a tendency to loss 2 electrons?

Question 19 options:

oxygen

cesium

strontium

Question 20 (5 points)

In a C-Br bond, the carbon has a partial negative charge.

Question 20 options:

N2

Cl2

O2

Explanation / Answer

Question 8 (5 points)

Which of the following diatomic molecules is joined by a double covalent bond?

Oxygen O=O

Question 9 (5 points)

Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 5 electron groups (2 bonds and 3 lone pair electrons).

trigonal bipyramidal, linear, 180°

Question 10 (5 points)

An _____ reaction results when the energy required to break bonds in the reactants is greater than the energy released by the formation of products.

Endothermic reaction (requires energy from outside)

Question 11 (5 points)

Which of these elements tend to form ionic bonds with other elements?

NA, Ba, Al, Mg

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