MP1 Quarterly Review

The Atom

100

An isotope has the same number of ________, but different ________

protons, neutrons

200

An atom has an atomic number of 23 and a mass of 52. What element is it?

Vanadium

300

How many neutrons are in a I-128 atom?

75

400

Zinc has 27 electrons and 37 neutrons.

1. Atomic #

2. Mass #

3. Charge

1. 30

2. 67

3. +3

500

Antimony (Sb) has a charge of -4 and a mass of 122.

1. Atomic #

2. # electrons

3. # Neutrons

1. 51

2. 55

3. 71

Sig Figs

100

How many sig figs in:

3.45x10^-25

3

200

How many sig figs in:

792,200.00s

8

300

How many sig figs in:

10000000

1

400

How many sig figs in:

7.04040

6

500

Which of these measurements is expressed to four significant figures?

    a) 0.108 m                b) 2.6 x 10⁴ m

    c)16.530 m                d) 5.300 x 10^-7 m

D

Calculating with Sig Figs

100

Solve and round to the correct number of sig figs or decimals:

100.35 -7

93

200

Solve and round to the correct number of sig figs or decimals:

244.3 + 84.11

328.4

300

Solve and round to the correct number of sig figs or decimals:

133 x 1.562

208

400

Solve and round to the correct number of sig figs or decimals:

0.0283 x 0.0910

0.00258

500

Solve and round to the correct number of sig figs or decimals:

6.02x10²³  / 3.45x10^-25

1.74 x 10⁴⁸

Measurements

100

A graduated cylinder contains 110.5 mL of water. A piece of metal is dropped in and the water rises to 122.8 mL. What is the volume of the metal?

12.3 mL

200

Convert 66.7 g to mg

66700 mg

300

Convert 180 oz to lb

11 lb

400

Convert 2.2 kL to cL

220000 cL

500

Convert 120 cm/sec to yd/hr

4700 yd/hr

MISC

100

What is the volume of white metal in cubic centimeters of a 4.81 g sample if its density is 7.05 g/cm3?

0.682 cm3

200

If a rock with a density of 5.00 g/cm3 is broken into five equal pieces, what is the density of each piece?

5.00 g/cm3

300

What is the difference between accuracy and precision?

Accurate- close to true value

Precise- Close to each other

400

A student collected data. She massed the metal and found it was 11.2 g, 11.3, and 11.0 g. The actual mass of the substance was 5.70 grams. Describe in terms of accuracy and precision

Low accuracy 

High Precision

500

A 10.00 g piece of metal is submerged in a graduated cylinder initially containing 20.00 mL of water. With the metal in the cylinder, the level of the water is recorded as 21.40 mL. What is the density?

7.14 g/mL