Periodic Trends
Light Calculations
Conversions
Sig Figs
Accuracy/Precision
100

What is one of the 2 factors that affect periodic trends?

# of protons/electrons (electrostatic attraction)

# of energy levels (electron shielding)

100

What is the equation that shows the relationship between the speed of light, wavelength, and frequency?

c= lamda nu (upside down y and weird v)

100

If I am converting from meters to centimeters, and I am using the conversion 100 cm = 1 m, does the 1 meter go in the top of the next fraction or in the bottom of the next fraction? (I can show you what I mean if you need me to)

bottom

100

What kind of zero is present in the number below? Is it significant?

5407

Sandwiched, yes

100

Henrietta is sick and takes her temperature 3 times with the following results: 76 degrees, 78 degrees, 77 degrees

Her true temperature is 91 degrees

Was her data precise? Was it accurate?

Yes precise, not accurate

200

Which periodic trend(s) increase as you go up a column and to the right across a period?

Options: Atomic Radius, Electronegativity, Ionization Energy

Electronegativity and Ionization Energy

200

What is the speed of light?

a. 9.8 m/s

b. 3.0 x 108 m/s

c. 6.626 x 10-28 m/s

b. 3.0 x 108 m/s

200

How many inches are in .41 feet?

Put in proper sig figs

4.9

200

How many sig figs are in the number below:

980.00

5

200

Henrietta is sick and takes her temperature 3 times with the following results: 76 degrees, 102 degrees, 93 degrees

Her true temperature is 90 degrees

Was her data precise? Was it accurate?

Not precise, but accurate

300

Rank the following elements in order from biggest to smallest:

Nitrogen, Carbon, Boron

Boron, Carbon, Nitrogen

300

What is the unit for frequency?

Hertz

300

How many feet are in 4.26 miles? (1 mile = 5,280 feet) Put your answer in proper sig figs

22492.8 --> 22,500

300

Which kinds of zeros are significant?

Trailing with decimal, trailing without, sandwich, leading

Trailing with decimal, sandwich

300

Which reading is more precise?

97.1 degrees

97.105 degrees

97.105 degrees

400

Explain the trend for electronegativity and the REASON for the trend being the way it is.

Trend: increases to the right and up

Reason: increased # of electrons increases electrostatic attraction and lower numbers of energy levels means less electron shielding

400

What is the frequency of a wave with a wavelength of 5.43 m? (must be correct # of sig figs and the right unit)

5.52 x 10Hertz

or

55,200,000 Hertz

400

Convert 5.16 m/s to km/min

(1000 m = 1 km)

0.310

400

How many significant figures are in the number below:

0390020

5

400

What does percent error measure?

How accurate a value is/how close the value is to the accepted value

500

Which element has a higher 1st ionization energy and why?

Germanium or Silicon

Silicon

It has fewer energy levels and therefore less shielding, so it will require more energy to remove the electron

500

What is the wavelength of a wave if it has an energy of 625 J? 

E= h v

c= lamda v

h= 6.626 x 10-34

c= 3.0 x 108 m/s

3.18 x 10-28 m

500

Convert 8.714 mi/day2 to ft/hr2

(1 mile = 5,280 ft)

Put in proper sig figs

79.88

500

Provide a number that has 4 sig figs and includes at least 2 different types of zeroes

Depends on student answer

500

Carl experimentally determines a density value to be 56.1 g/cm3 and the actual value should have been 58.4 g/cm3

What is his percent error?

4%