Question 1

Which of the following statements about atoms is INCORRECT?

Accepted Answer

Atoms are manufactured in plants and in humans during pregnancy.

Question 2

What is the fundamental difference between an element and an atom?

Accepted Answer

An element is a material made of only one kind of atom, while an atom is the fundamental unit of an element.

Question 3

A neutral atom of carbon has an atomic number of 6. How many electrons does it have?

Accepted Answer

$$6$$

Question 4

A nucleus with an atomic number of $$44$$ and a mass number of $$100$$ must have how many neutrons?

Accepted Answer

$$56$$

Question 5

Which of the following best describes the organization of the periodic table?

Accepted Answer

Elements are arranged by increasing atomic number in rows called periods and columns called groups.

Question 6

Which atom is larger: a lithium atom or a fluorine atom?

Accepted Answer

A lithium atom

Question 7

Which of the following is a conceptual model?

Accepted Answer

A diagram showing electron shells in an atom

Question 8

What does each spectral line in an atomic spectrum represent?

Accepted Answer

All of the above

Question 9

Why does the hydrogen spectrum consist of many spectral lines, even though hydrogen has only one electron?

Accepted Answer

One electron can be boosted to many different energy levels.

Question 10

When an atom is excited, what happens?

Accepted Answer

Its electrons are boosted to higher energy levels.

Question 11

According to the quantum hypothesis, the energy of a photon is directly proportional to which property of light?

Accepted Answer

Frequency

Question 12

Which of these photons has the greatest energy?

Accepted Answer

Blue light

Question 13

Which of the following is a quantum number?

Accepted Answer

$$2$$

Question 14

What is the main reason atoms do not collapse according to Bohr's model?

Accepted Answer

Electrons can lose only specific amounts of energy equivalent to transitions between levels.

Question 15

Which of the following best explains why only certain energy levels are permitted for electrons in atoms?

Accepted Answer

Only an integral number of standing electron waves can fit in the paths about the nucleus.

Question 16

If an atom has 17 protons, 18 neutrons, and 17 electrons, what is its mass number?

Accepted Answer

$$35$$

Question 17

Which of the following statements about isotopes is TRUE?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 18

Which group on the periodic table contains the noble gases?

Accepted Answer

Group 18

Question 19

Which of the following best describes the relationship between atomic number and the number of electrons in a neutral atom?

Accepted Answer

The atomic number equals the number of electrons in a neutral atom.

Question 20

Which of the following best describes the emission of light from an atom?

Accepted Answer

A photon is emitted when an electron drops from a higher to a lower energy level.

Atoms and the Periodic Table: Structure, Properties, and Quantum Models

Study Guide - Practice Questions