I. Atoms and the Periodic table

Question 1

I have a cup of C-12 and a bowl of C-16. Which one has more protons?

Accepted Answer

The both have the same.

Question 2

which element is more reactive? N, O or F

Accepted Answer

F

Question 3

What led to Schrodinger's model?

Accepted Answer

The wave nature of an atom

Question 4

which one is bigger?

Accepted Answer

Neutrons

Question 5

Which atomic model is the following?

Accepted Answer

Rutherford

Question 6

How many neutrons does fluorine have?

Accepted Answer

10

Question 7

How many grams is 2.5 x 1024 molecules of H2O? Molar mass 18

Accepted Answer

74.7

Question 8

How many grams is 3.5 x 1023 molecules of water? Molar mass is 18

Accepted Answer

10.46

Question 9

You have a Chlorine-35 isotope. You remove a proton. What do you get?

Accepted Answer

A sulfur isotope

Question 10

Which model describes electrons by the amount of energy they have?

Accepted Answer

Bohr

Question 11

How many electrons does C-12 and C-14 have

Accepted Answer

6 and 6

Question 12

Which one has more protons? C-12 or B-13

Accepted Answer

C-12

Question 13

58 grams of NaCl is equal to

Accepted Answer

1 mole of NaCl

Question 14

Which model uses energy orbitals to describe the atom?

Accepted Answer

Schrodinger

Question 15

Mg 2+ is an example of

Accepted Answer

magnesium ion

Question 16

1 mole of H20 has how many molecules of H20?

Accepted Answer

6.02 x 1023

Question 17

What led to Rutherford's model?

Accepted Answer

the gold foil experiment

Question 18

What led to JJ Thomsons model?

Accepted Answer

the fact that an atom has both positive and negative parts

Question 19

How many particles are there in 15 grams of H2O? Molar mass is 18

Accepted Answer

5 x 1023

Question 20

which one is bigger?

Accepted Answer

Trick questions: Protons and Neutrons are the same size!

Question 21

What does the Schrodinger model do well?

Accepted Answer

shows were the electrons are around the nucleus

Question 22

What led to Bohr's model?

Accepted Answer

absorption and emission spectra

Question 23

What is the mass number for Oxygen-18?

Accepted Answer

18

Question 24

Which model first suggested the existence of a nucleus?

Accepted Answer

Rutherford

Question 25

58 grams of NaCl is equal to

Accepted Answer

6.02 x1023 molecules of NaCl

Question 26

3 moles of H20 is equal to how many grams of H20? (molar mass is 18)

Accepted Answer

54

Question 27

Which model suggested that gold atoms are different than silver atoms?

Accepted Answer

Dalton

Question 28

8 grams of NH3 is equal to how many moles of NH3? Molar mass is 17

Accepted Answer

0.47 moles

Question 29

U235 and U238 are different how?

Accepted Answer

They have different number of neutrons

Question 30

which element is more reactive? O, Se, S?

Accepted Answer

O

Question 31

Which atomic model is the following?

Accepted Answer

Schrodinger

Question 32

what is the progression of models used to describe the atom?

Accepted Answer

Dalton-JJ-Rutherford-Bohr-Schrodinger

Question 33

How do we find the number of neutrons?

Accepted Answer

Mass number - atomic number

Question 34

How many neutrons does C-18 have?

Accepted Answer

12

Question 35

What is a limitation of Bohr's model?

Accepted Answer

Doesn't show where the electrons actually are

Question 36

Which model is known as the plum pudding model?

Accepted Answer

JJ thomspon

Question 37

What is a limitation of JJ Thomsons model?

Accepted Answer

no nucleous

Question 38

What is a limitation of Rutherford's model?

Accepted Answer

Electrons don't orbit the nucleous

Question 39

Carbon has 6 protons. What happens if you add a proton?

Accepted Answer

you get nitrogen

Question 40

Which two elements are likely to have similar properties?

Accepted Answer

N and P

Question 41

How many particles are there in 5 g of H20? Molar mass is 18

Accepted Answer

1.67 x1023

Question 42

Which two elements are likely to have similar properties?

Accepted Answer

F and Cl

Question 43

What is the mass number for Carbon-40

Accepted Answer

40

Question 44

Which atomic model is the following?

Accepted Answer

Bohr

Question 45

6 grams of water is equal to how many moles of water? (molar mass is 18)

Accepted Answer

0.33 moles

Question 46

Which one is bigger?

Accepted Answer

Protons

Question 47

Which atomic model is the following?

Accepted Answer

JJ Thomson

Question 48

How many protons does U235 have?

Accepted Answer

92

Question 49

How many electrons does Ca 2+ have?

Accepted Answer

18

I. Atoms and the Periodic table

Questions 49

I. Atoms and the Periodic table

Questions 49