Midterm Pointers

Question 1

The alphabetic abbreviations of an element

Answer 1

Chemical Symbols

Question 2

It determines the chemical properties of an element

Answer 2

Number & Arrangement of Electrons

Question 3

Eqqual to the number of protons

Answer 3

Atomic number

Question 4

Atomic number symbol

Answer 4

Z

Question 5

Atomic mass number formua

Answer 5

P + n

Question 6

Atomic mass number symbol

Answer 6

A

Question 7

Protocol for Representing Elements in a Molecule

Answer 7

• Upper Left: atomic mass (A)
• Lower Left: atomic number (Z)
• Upper Right: valence state (+/-)
• Lower Right: number of atoms/molecules

Question 8

“The (1) & the precise (2) of an atom are not equal!”

Answer 8

1. atomic number
2. mass

Question 9

Various nuclear arrnagments

Answer 9

Isotope
Isobar
Isotone
Isomer

Question 10

The group of atoms of various elements.

Answer 10

Molecules

Question 11

The smallest unit of a
compound

Answer 11

Molecules

Question 12

90% of the human body

Answer 12

CHON (C-6, H-1, O-8, N-7)
Carbon, Hydrogen, Oxygen, Nitrogen

Question 13

Any quantity of one type of molecule

Answer 13

Chemical Compound

Question 14

NaCl (Sodium Chloride) which is a common (1) is an example of (2)

Answer 14

1. table salt
2. chemical compound

Question 15

The chemical union between atoms formed by sharing one or more pairs of electrons.

Answer 15

Covalent Bond

Question 16

Covalent Bond example

Answer 16

H2O

Question 17

The bonding that occurs because of an electrostatic force between ions

Answer 17

Ionic Bond

Question 18

Example of an Ionic Bond

Answer 18

NaCl, Sodium bicarbonate (NaHCO3)- Baking soda

Question 19

The primary constituents of the x-ray tube target

Answer 19

Tungsten (W-74) & Molybdenum (Mo-42)

Question 20

Radiographic & fluoroscopic contrast agents

Answer 20

Barium (Ba-56) & Iodine (I-53)

Question 21

Important component of human tissue

Answer 21

Carbon (C-6)

Question 22

The amount of energy (34 keV) necessary to ionize tissue atoms

Answer 22

Ionization Potential

Question 23

The smallest particle of an element is an (1); the smallest particle of a compound is a (2)

Answer 23

1. atom
2. molecule

Question 24

Determines the chemical element and the behavior of an atom

Answer 24

Number of protons

Question 25

The force that keeps an electron in orbit

Answer 25

Centripetal force

Question 26

Centripetal force is also called —

Answer 26

Center-seeking force

Question 27

The force that causes an electron to travel straight and leave the atom.

Answer 27

Centrifugal force

Question 28

Other term for Centrifugal force

Answer 28

Flying-out-from-the-center force

Question 29

The strength of the attachment of an electron to the nucleus

Answer 29

Electron Binding Energy

Question 30

Symbol for Electron Binding Energy

Answer 30

Eb