Chemistry Review Test 1

Matter

100

Identify the following as an element, molecule compound, homogeneous mixture or heterogeneous mixture:

magnesium oxide (MgO)

Compound

200

Identify the following as an element, molecule, compound, homogeneous mixture or heterogeneous mixture:

Helium (He)

Element

300

Identify the following as an element, molecule, compound, homogeneous mixture or heterogeneous mixture:

Gatorade

Homogeneous Mixture

400

Identify the following as an element, molecule, compound, homogeneous mixture or heterogeneous mixture:

Granite

Heterogeneous Mixture

500

Identify the following as an element, molecule, compound, homogeneous mixture or heterogeneous mixture:

Chlorine gas (Cl₂

Molecule

Sig Figs and Scientific Notation

100

How many significant figures are in 1.0034?

5

200

How many signficant figures are in 0.002300900?

7

300

Write 290456.45 in scientific notation (round to 4 sig figs)

2.905 x 10⁵

400

How many sig figs are in the result of the following calculation?

4.562 * 9.873 * 2.34

3

500

How many sig figs are in the result to the following calculation?

23.45 + 8.9 + 123.456

4 (115.8 with one decimal place!)

The Periodic Table

100

Is the following element a metal, nonmetal, or metalloid? 

Mo

Metal

200

What is the predicted charge of an ion formed from the following element: 

Br

-1

300

What is the expected charge of the alkali earth metals?

+2

400

How many Noble Gasses are on the periodic table?

6 (He, Ne, Ar, Kr, Xe, Rn) - if we include OG then the asnwe is 7.

500

What is Dr. Gunderson's favorite element?

Mn

Atomic Notation and Mass

100

How many protons are in ²⁷₁₃Al

13

200

How many neutrons are in ³¹P?

16

300

How many electrons are in ⁸⁸₃₈Sr²⁺

36

400

What is the average atomic mass of Zn in amu?

65.38 amu

500

Estimate the average atomic mass of the following element given the natural abundances:

X-50 75%; X-52 25%

Actual answer: 50.5 amu (range of 50.25 - 5.75 is acceptable)

Unit Conversions, and the Mole

100

What is the mass on one mole of N atoms?

14.01 g

200

Convert 34.5 g to kg? (1000 g = 1 kg)

0.0345 kg or 3.45 x 10^-2 kg

300

What is the molar mass of P?

30.97 g/mol

400

What property of a material allows up to convert between mass (e.g. g) and volume (e.g. mL)

Density (g/mL)

500

How many atoms are in 1 mole of B?

6.022 x 10²³ atoms (Avogadro's Number)