Chemistry A: Structure of the Atom

Question 1

Which of the following best describes the mass of a neutron

Accepted Answer

1 amu

Question 2

Based on the spectrum the most abundant isotope has a mass of

Accepted Answer

11

Question 3

Which of the following best describes the mass of an electron

Accepted Answer

0 amu

Question 4

An atom with 29 protons, 35 neutrons, and 29 electrons could be identified as which element?

Accepted Answer

Copper

Question 5

How many electrons can be placed in a single orbital

Accepted Answer

2

Question 6

Which of the following best describes the charge of an electron?

Accepted Answer

Negative

Question 7

Which of the following components was the major flaw in of Bohr's theory of the atom

Accepted Answer

Electrons move in circular paths around the nucleus

Question 8

Which of the following best describes the charge of a proton

Accepted Answer

Positive

Question 9

When electron gain energy they move to higher energy levels and then..

Accepted Answer

Move back down to lower levels releasing photons

Question 10

How many protons are contained in an atom of Francium

Accepted Answer

87

Question 11

The pauli exclusion principle states that...

Accepted Answer

Electrons in the same orbital must have opposite spins

Question 12

An element has two isotopes with mass of Q35 and Q38. If the atomic mass is 35.5 which is close

Accepted Answer

80% Q-35, 20% Q-38

Question 13

Iridium-190 contains how many neutrons

Accepted Answer

113

Question 14

How many electrons can be placed on the 3rd energy level?

Accepted Answer

18

Question 15

Which of the following best describes the mass of a proton

Accepted Answer

1 amu

Question 16

Which of the following is the correct electron configuration for cadmium

Accepted Answer

[Kr] 5s2 4d10

Question 17

Which of the following isotopes would be deflected most in a mass spectrometer

Accepted Answer

Copper-63

Question 18

An atom has 3 isotopes with mass of 91, 92, 93. What is the atomic mass if they occur equally

Accepted Answer

92

Question 19

An atom with a mass number of 35 and an atomic number of 17 has how many neutrons?

Accepted Answer

18

Question 20

Which of the following is the correct electron configuration for scandium?

Accepted Answer

1s2 2s2 2p6 3s2 3p6 4s2 3d1

Question 21

Based on the spectrum identify the element

Accepted Answer

Zirconium

Question 22

In 1932 James Chadwick finally discovered which of the following

Accepted Answer

Neutrons

Question 23

Democratis was the first to conceptualize an indivisible particle. What was the term he used?

Accepted Answer

Atomos

Question 24

Using a cathode ray tube JJ Thomson discovered which of the following?

Accepted Answer

Electron

Question 25

Which of the following best describes the charge of a neutron?

Accepted Answer

Neutral

Question 26

Which of the following particles is likely to be found in the nucleus of the atom?

Accepted Answer

Protons and Neutrons

Question 27

Silver-108 contains how many electrons

Accepted Answer

47

Question 28

Which of the following components of Bohr&#x27;s theory was correct

Accepted Answer

Electrons exist at specific levels of energy

Question 29

Given that the element has 32 protons, The most abundant isotope has how many neutrons

Accepted Answer

38

Question 30

An atom has 14 protons, 14 electrons and 15 neutrons. Which of the following is an isotope.

Accepted Answer

Silicon-28

Question 31

Ernest Rutherford was famous for his gold foil experiment in which he proved that...

Accepted Answer

All of these are correct

Question 32

The 'f' sublevel can contain how many electrons?

Accepted Answer

14

Question 33

Dalton was one of the first to discover which of the following?

Accepted Answer

Atoms combine in whole numbers

Question 34

As the wavelength of light increases

Accepted Answer

frequency and energy both decrease

Question 35

Which of the following gives the best definition for an electron orbital

Accepted Answer

An area around the nucleus in which an electron can be found

Question 36

How many neutrons are in Nickel-60

Accepted Answer

32

Question 37

Which of the following best describes the location of the electrons in the atom?

Accepted Answer

In orbitals moving outside the nucleus

Question 38

In a flame test K produces purple light while Cu produces green light, this suggests that...

Accepted Answer

Potassium has larger electron transitions than copper

Question 39

An atom with 43 protons, 43 electrons, and 55 neutrons has what chemical symbol

Accepted Answer

Tc

Question 40

An atom with 11 protons, 12 neutrons, and 11 electrons has a mass number of...

Accepted Answer

23

Question 41

Bohr proposed theories about the movement of electrons within the atom. His model was called...

Accepted Answer

The planetary model

Question 42

JJ Thomson proposed a model for the atom known as the plum pudding model which states...

Accepted Answer

Electrons are even distributed throughout the atom

Question 43

How many neutrons are contained in an isotope of lithium-7

Accepted Answer

4

Question 44

An atom has an atomic number 30 and a mass number of 65 which of the following is an isotope?

Accepted Answer

Zinc-64

Question 45

What is the best estimation for the atomic mass of the element shown

Accepted Answer

10.9

Chemistry A: Structure of the Atom

Questions 45

Chemistry A: Structure of the Atom

Questions 45