Unit 7

Using the graph, what general trend exists for the first ionization energy within a period?

• Ionization energy increases

• Ionization energy increases then decreases

• Ionization energy decreases

• Ionization energy remains constant

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has the highest ionization energy?

• Phosphorus

• Fluorine

• Neon

• Argon

Tags

NGSS.HS-PS1-1

Which diagram below depicts the atom with the lowest first ionization energy?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The ionization potential of an element is the amount of energy required to remove an electron from an isolated atom or molecule. According to the periodic table, which of the following indicates the correct decreasing order of ionization potential?

• Li > Na > K > Cs

• Li > K > Na > Cs

• Na > K > Li > Cs

• Cs > K > Na > Li

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to VSEPR theory, what is the shape of a molecule of difluoromethane, CH2F2?

• trigonal planar

• linear

• tetrahedral

• bent

Use the electron dot formula of the nitrate ion to predict the shape of the ion.

• linear

• trigonal planar

• trigonal pyramidal

• tetrahedral

Which of these molecular geometries forms a molecule with a bent shape?

• linear geometry with two lone pairs of electrons

• tetrahedral geometry with one lone pair of electrons

• trigonal planar geometry with one lone pair of electrons

• trigonal planar geometry with two lone pairs of electrons

What is the correct Lewis dot structure for hydrogen fluoride (HF) as shown in the image?

• 2

• 1

• [ ]+ . .

• [ ]- . .

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of bonds does acetylene, C₂H₂, contain according to the image?

• One single bond and two double bonds

• One single bond, one double bond, and one triple bond

• Two single bonds and one double bond

• Two single bonds and one triple bond

Tags

NGSS.HS-PS1-1

Given the original conditions of a gas at 400.0 L, 0.250 atm, and 550 K, what is the new volume when the temperature is decreased to 315 K and the pressure is increased to 1.90 atm?

• 30.1 L

• 51.5 L

• 98.3 L

• 142.6 L