PreDP Chemistry Unit 2 Exam Review

Random

100

What is a filtrate?

The filtrate is the liquid the goes through a filter

200

What is the concentration of the following solution in grams / liter?

40 grams of solute

150 ml of solvent

40 g /0.150 ml of solvent

266 grams / liter

300

Which of these has the highest atomic mass?

a) Protium

b) Deuterium

c) Tritium

c) Tritium

H-3 has the highest atomic mass

400

A certain solution has 66 grams of CO₂ in it. How many moles of CO₂ is that

C = 12 grams / mol

O = 16 grams / mol

50/44 moles

or

1.5 moles

500

Which of these is basic?

a) CO₂

b) NaO₂

c) SO₂

d) FO₂

b) Metal oxides are basic and Na is a metal

Inside the Atom

100

What are the three subatomic particles

Electrons, Neutrons, Protons

200

What are nucleons?

Protons and Neutrons

300

Zirconium has 40 protons. How many neutrons might it have?

a) 40

b) 50

c) 54

d) 80

b) or c)

Zirconium-90 has 50 neutrons

and 

Zirconium-94 has 54 neutrons

400

What is the total charge inside an atom of Nitrogen?

+7

500

What is the approximate mass of an electron? 

1/2000 of a proton 

or

(1/1840) of a proton

or

0.000545  amu

Isotopes

100

What is an isotope

Element with same number of protons and different number of neutrons 

200

What are the stable isotopes of Chlorine?

Cl-35 and Cl-37

300

What is the relative atomic mass of the following sample of Iron which is 50% Fe-54 and 50% Fe-57

55.5 u

400

Which Isotope is radioactive?

1) He-4

2) Co-60

3) C-12

4) N-14

2) Co-60 is the most stable isotope of Cobalt, but it's still radioactive with half life of 5.3 years.

500

The half life of carbon-14 is 5730 years.

If I have 10 grams of carbon-14, how much will I have left in 10000 years

N(t) = No (1/2) ^ (t/t_half life) 

2.98 grams

Electron Configuration + Periodic Table

100

What is the electronic configuration of Oxygen?

(2,6)

200

What element occupies group 1 period 4?

Potassium (K)

300

Why are noble gases so stable and unreactive?

It has a full valence electron shell.

400

Which of these are in the same group?

a) (2)

b) (2,8)

c) (2,8,2)

d) (2,1)

a) and b)

a) Helium

b) Neon

They are both in group 18.

500

What is the electronic Configuration of Gold?

(2,8,18,32,18,1)

Metals and Nonmetals

100

Is Aluminum a metal or a non metal

Metal

200

Which of these is not a property of metal?

a) Lustrous

b) Ductile

c) Sonorous

d) Acidic Oxides

d) 

Metal forms Basic Oxides

300

What happens if I strike a solid block of sulfur?

It breaks because sulfur is a non metal and brittle

400

Which of these are good conductors of electricity? (Pick two)

a) Oxygen

b) Graphite (Carbon)

c) Iron

d) Selenium

b) and c)

Graphite is a good conductor even though it's carbon

500

Which group 1 element is not a metal?

Hydrogen

About Mrs. Tang

100

Mrs. Tang's favorite subatomic particle is the electron.

What is the relative charge of an electron?

-1 

200

Mrs. Tang's favorite element is Carbon

What is the Atomic Number of Carbon

6

If you said 12, then half credit. 12 is the Atomic Mass, not the Atomic Number

300

Mrs. Tang's favorite metal is Iron? What are three properties of Iron?

Magnetic, Ductile, Malleable, Dense, Lustrous, Good conductor of heat and electricity.

Reacts with acids

Metal-oxides are basic.

400

Mrs. Tang's favorite drink is Taro Gongcha.

She weighed her drink

152 g ± 1 g

Then she drank some of it and weighted again.

115 g ±  1g

How much did she drink (include uncertainty)

37 g ±  2 g

500

What is Mrs. Tang's favorite Korean food

a) 국밥

b) 김밥

c) 볶음밥 

d) 비빔밥

a) 국밥