Ch. 2 Radiation Concepts

Question 1

The unit of mass is the:

Answer 1

Kilogram

Question 2

An electron is ____ charged.

Answer 2

Negatively

Question 3

The orderly arrangement of elements in the periodic table is based upon:

Answer 3

Atomic number

Question 4

Photon wavelength is ______ to photon frequency.

Answer 4

Inversely proportional

Question 5

All of the following are true of electromagnetic energies EXCEPT:

a. They are illustrated as sinusoidal waves
b. They possess both wave and particle characteristics
c. The relationship between frequency and wavelength is direct and proportional
d. They are arranged in an orderly spectrum according to frequency and wavelength

Answer 5

c. The relationship between frequency and wavelength is direct and proportional

Question 6

The maximum number of electrons found in any energy level (shell at any point in time is calculated by the formula:

Answer 6

2n^2

Question 7

The sum of protons and neutrons in a nucleus is called the:

Answer 7

Mass number

Question 8

Groups of the periodic table:

Answer 8

Represent elements with the same outer electron configuration

Question 9

Carbon has an atomic number of 6. One of its isotopes has a mass number of 14. The number of neutrons in this isotope is:

Answer 9

8

Question 10

A period in the periodic table is:

Answer 10

The principal quantum number

Question 11

In the excitation process, electrons in an atom are moved to a _____ energy state.

Answer 11

Higher

Question 12

The maximum number of electrons in a period with a principal quantum number of 4 is:

Answer 12

32

-2n^2

Question 13

Isotopes have _____ mass numbers and ____ atomic numbers.

Answer 13

Different; the same

Question 14

In a vacuum, electromagnetic radiation:

Answer 14

Has a velocity equal to the speed of light.

Question 15

If the photon frequency of electromagnetic radiation is increased tenfold, then the wavelength will:

Answer 15

Decrease to 1/10

Question 16

Electromagnetic radiation with a frequency of 2,000 Hertz would have a wavelength of:

Answer 16

1.5 x 10^5 cm

Question 17

The atomic number is the number of _____ contained in the nucleus.

Answer 17

Protons

Question 18

An isotope of boron has 5 protons and 6 neutrons. The atomic umber of boron is:

Answer 18

5

Question 19

An element with an atomic umber of 22 has how many electros in the second principal quantum number level (L shell)?

Answer 19

8

Question 20

The nuclear particles that distinguish one element from another are the:

Answer 20

Protons

Question 21

If the frequency of a wave is 1,000 Hertz and is traveling at 50,000 m/sec, then its wavelength is:

Answer 21

50 m

Question 22

According to the rule of octets:

Answer 22

The valence shell is chemically inert

Question 23

Which of the following is not a basic characteristic of the wave equation?

a. Velocity
b. Wavelength
c. Frequency
d. Energy

Answer 23

d. Energy

Question 24

If an electron is gained or lost from an atom, that atom becomes:

Answer 24

An ion.

Question 25

All of the following are energy forms EXCEPT:

a. Sound
b. Quantum
c. Electrical
d. Nuclear

Answer 25

a. Sound

Question 26

Quarks may behave according to the _____ theory.

Answer 26

String

Question 27

All of the following are true of the substance glucose (C6H12O6) EXCEPT:

a. The smallest subdivision of this molecule is glucose
b. It is a compound
c. It consists of 3 elements
d. It may be broken down into one atom of glucose

Answer 27

d. It may be broken down into one atom of glucose

Question 28

When comparing iodine (Z=53) with barium (Z=56):

a. Barium has a lower k-shell binding energy
b. Iodine has more neutrons
c. Iodine has 5 orbitals with electrons
d. Barium has fewer protons

Answer 28

c. Iodine has 5 orbitals with electrons