Q1 Review

Why does nitrogen have a larger atomic radius than fluorine?

• Fluorine has a greater nuclear charge which attracts the electrons more and makes it smaller

• Nitrogen has a greater nuclear charge which makes it a larger atom

• Nitrogen has more occupied energy levels

• Fluorine has less occupied energy levels

Tags

NGSS.HS-PS1-1

How many grams of He would there be in a 2.0L container at 10^Oc and 2.0 atm?

• 0.172 g

• 0.689 g

• 2 g

• 0.2 g

The following information below lists the first ionization energy of the elements. Why is there a dip in trend for Sulfur?

Al 5986

Si 8152

P 10487

S 10360

Cl 12968

• The atomic radius of S is greater than P

• There is attraction between the electrons which reduces the IE

• There is repulsion between the paired electrons in Sulfur's 3p orbital

• The electronegativity dips for sulfur

Tags

NGSS.HS-PS1-2

Order the following from in terms of increasing polarity.

• H-H < H-F < N-F

• N-F < H-H < H-F

• H-F < N-F < H-H

• H-H < N-F < H-F

Tags

NGSS.HS-PS2-4

What is the bond angle for trigonal planar?

• 120

• 109.5

• 180

• 114

What is the bond angle for tetrahedral?

• 109.5

• 114

• 120

• 180

What is the bond angle for trigonal pyramidal?

• 107

• 120

• 180

• 150

Calculate the average atomic mass for X: 55.3% X-121.21, 21.5% X-125.5, 23.2% X-127

• 123

• 120.43

• 125.33

• 123.48

A student uses a spectrophotometer and determines the concentration of a sports drink and plots it against the absorbance. He notices one of the concentrations falls below where is should be according to his graph. What could be a reason for the error?

• The student did not dry the cuvette after rinsing it and there was leftover water in it

• The student did not clean the cuvette and left a fingerprint on the outside

• The student added too much of the sports drink

A student uses a spectrophotometer and determines the concentration of a sports drink and plots it against the absorbance. He notices one of the concentrations falls above where is should be according to his graph. What could be a reason for the error?

• The student did not dry the cuvette after cleaning it with water

• The student did not clean the outside of the cuvette and left a fingerprint on it