The Chemical Level Of Organization

Question 1

Chemical symbols

Answer 1

Elements given letter abbreviations

Question 2

Atoms

Answer 2

Contains protons neutrons and electrons

Question 3

Protons

Answer 3

Positive charge + particles

Question 4

Neutrons

Answer 4

Neutral

Question 5

Electrons

Answer 5

Negative charge -

Question 6

Atomic number

Answer 6

Determines the element the number of protons in a atom

Question 7

Isotopes

Answer 7

Are formed when the number of neutrons change

Question 8

Mass number

Answer 8

The sum of protons and neutrons in an atom and indicates how much the atom weighs this is always a whole number

Question 9

Atomic mass

Answer 9

Atomic weight is the average mass of all naturally occurring isotopes this average is not exactly a whole number

Question 10

CHON

Answer 10

Make of 96% of the body

Question 11

Ions

Answer 11

Are atoms that given up or gained and electron in their outer electron shell

Question 12

Molecules

Answer 12

Are formed when atoms share electrons

Question 13

Electrolytes

Answer 13

Molecule that dissociates in water to from individual ions

Question 14

Chemical bonds

Answer 14

The atoms of the molecule are held together by forces of attraction

Question 15

Ionic bonds

Answer 15

Form when an atom loses or gains an electron ions are formed

Question 16

Anions

Answer 16

Are negatively charged ions that picked up one or more electrons that another atom has lost they are electron acceptors

Question 17

Cations

Answer 17

Are positively charged ions that have given up one or more electrons they are electron donors

Question 18

Covalent bonds

Answer 18

Are formed by atoms of molecules sharing one two or three pairs of their outermost electrons covalent bonds are the strongest chemical bonds

Question 19

Hydrogen bonds

Answer 19

Are weak interactions result from attraction of oppositely charged parts of molecules they should not be confused with covalent bonding to hydrogen which involves actual sharing of electrons are large 3-D bonds like proteins and DNA are held together by hydrogen bonds

Question 20

Chemical reactions

Answer 20

Reactions that occur when electrons in the outermost shell are shared or transferred new bonds form and old bonds broken

Question 21

Chemistry

Answer 21

The study of matter