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40 Final Review

Last updated almost 5 years ago

35 questions

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Elements, compounds and mixtures

Question 1

1.

Question 2

2.

Question 3

3.

Atomic structure and electron configuration

Question 4

4.

Question 5

5.

Question 6

6.

Question 7

7.

Question 8

8.

Question 9

9.

Question 10

10.

Question 11

11.

Question 12

12.

Question 13

13.

Periodic Trends and Periodic Table

Question 14

14.

Question 15

15.

Question 16

16.

Question 17

17.

Question 18

18.

Bonding, naming and chemical equations

Question 19

19.

Question 20

20.

Question 21

21.

Question 22

22.

Question 23

23.

Question 24

24.

Question 25

25.

Question 26

26.

Question 27

27.

Question 28

28.

Question 29

29.

The mole, molar mass and conversions

Question 30

30.

Question 31

31.

Question 32

32.

Question 33

33.

The rest of the questions use this balanced equation. 2AlCl3 + 3Na2SO4 --> Al2(SO4)3 + 6NaCl

Question 34

34.

Question 35

35.

5.4 grams of NaCl needs how much AlCl3 to react completely?

Which of the following is classified as an element?

salt

oxygen

salsa

all of the above

How many known elements are there?

35

118

1120

10,554

Which is not a mixture?

milk

carbon dioxide

lemonade

coffee

How many valence electrons are there in a magnesium atom?

2

4

6

8

How many valence electrons are there in a oxygen atom?

2

4

6

8

How many valence electrons are there in a sodium atom?

1

3

5

7

How many neutrons are in 25Mg?

11

12

13

25

The number of protons in carbon-13 is

6

13

7

12

Elements with the same number of protons that have a different number of neutrons, hence a different atomic mass are known as

ions 

tomatoes

isotopes

cations

What is the shape of an s orbital?

a bar

a dumbbell

two dots

a sphere

What is the electron configuration of boron?

1s22s22p23s1

1s22s22p63s1

1s22s22p1

1s22s22p3

What is the electron configuration of O2-?

1s22s22p6

1s22s22p3

1s22s22p23s1

1s22s22p63s1

JJ Thomson, when he discovered there were negative particles came up with which model of the atom?

A model in which the region outside the nucleus is largely empty space in which the electrons are located

A model in which the nucleus is made of neutrons only

A model in which the nucleus is made of protons, electrons, and neutrons

A model in which the protons and electrons  are evenly distributed throughout the volume of the atom

Which of the following elements has the biggest radius?

sodium

aluminum

phosphorus

chlorine

Which of the following elements has the smallest radius?

selenium

bismuth

calcium

iodine

Which of the following element is in the alkali metal group?

potassium

chlorine

calcium

copper

Which of the following elements has properties most  similar to fluorine?

carbon

oxygen

strontium

iodine

As you move from left to right across the second period of the periodic table:

the atomic mass decreases

the electron affinity decreases

the electronegativity increases

the atomic radius increases

What is true about covalent bonds?

Held together by opposite charges

Formed by sharing electrons

Formed by the transfer of an electron

Formed between metals and non metals

In a chemical reaction between acetic acid and sodium hydrogen carbonate where sodium acetate, water and carbon dioxide are formed, which are the reactants?

acetic acid, sodium acetate and water

acetic acid and sodium hydrogen carbonate

carbon dioxide, water and hydrogen

carbonate, water and sodium acetate

Which of the following not true about chemical reactions?

the total mass of the reactacts equals the total mass of the products

the number atoms of elements of the reactants equals the number of atoms of the reactants

the total mass of the products is greater than the total mass of the reactants

Which substance is most likely ionic?

NO2

CO

NaOH

HNO3

What is the charge on a sulfur ion

2-

1-

0

1+

2+

Select the correct name for: BF3

nitrogen monoxide

dinitrogen pentoxide

sodium iodide

boron triple fluoride

silicon dioxide

calcium nitrogen trioxide

calcium nitrate

boron trifluoride

silver dioxide

calcium dinitrate

Select the correct name for: Mg(NO3)2

nitrogen monoxide

dinitrogen pentoxide

sodium iodide

boron triple fluoride

silicon dioxide

calcium nitrogen trioxide

magnesium nitrate

boron trifluoride

silver dioxide

calcium dinitrate

Choose the correct formula for sodium cyanide

SoCyN

NaCy

NaCN

NaC

Choose the formula for copper (II) hydroxide

CoOH

Cu(OH)2

CUOH

cuOh

Which coefficients prove the conservation of mass in the following equation: CO + Fe₂O₃ --> Fe + CO₂

1, 3, 1, 3

1, 1, 2, 3

3, 1, 2, 3

2, 1, 3, 3

Which coefficients prove the conservation of mass in the following equation: Cu + 2AgNO₃ --> 2Ag + Cu(NO₃)₂

3, 1, 2, 3

1, 3, 1, 3

2, 1, 3, 3

1, 2, 2, 1

The number of hours in 2 years can be calculated by which of the following?

2 years x 365 days/1 year x 24 hrs/1 day                                

365 days x 2 years/24 hrs x 1 day/1 year

2 years x 1 year/365 days x 24 days/ 1 hr

What is the molar mass of  NaOH?

28 g/mol

40 g/mol

44 g/mol

56 g/mol

How many moles are in 35.6 grams of iron?

1 mol

55.8 mol

5.4 mol

0.638 mol

How many grams does 2.1 moles of water weigh?

18.0 grams

37.8 grams

21.0 grams

How many moles of NaCl are produced from 2.0 moles of AlCl3?

6.0 moles

3.0 moles

1.0 moles

2.0 moles