corroision I

Question 1

what is corrosion?

Answer 1

an electrochemical reaction, the breaking of ionic and atomic bonds and the formation of new ones.

Question 2

what are the chemical properties of matter determined by?

Answer 2

the electrons around the nucleus of it’s atom, particularly the outer valence electrons

Question 3

what do molecules consist of?

Answer 3

2 or more atoms

Question 4

what do atoms consist of?

Answer 4

protons, neutrons, and electrons

Question 5

T or F an atom is electrically neutral?

Answer 5

True! Because the electrical charges of the particles that compromise the atom balance each other

Question 6

what is the core of the atom called?

Answer 6

Nucleus

Question 7

what 2 particles does the nucleus consist of and what are their properties?

Answer 7

protons-carry a positive charge

neutrons- carry no charge

Question 8

what is the net charge of a nucleus?

Answer 8

positive

Question 9

what type of charge does an electron have?

Answer 9

negative, they orbit around the nucleus in layers, keeping the atom ballanced

Question 10

what is the simplest atom?

Answer 10

Hydrogen

Question 11

what determines the VALENCE of an atom?

Answer 11

the number of electrons in its outermost shell

Question 12

when is an atom in its most stable state and least inclined to participate in a chemical reaction?

Answer 12

when the valence shell is completely filled with electrons

Question 13

do molecules carry an electrical charge?

Answer 13

no

Question 14

what is ionization?

Answer 14

the process by which an atom or molecule acquires a charge.

Question 15

what is an ion?

Answer 15

Atoms or molecules that have either gained or lost one or more electrons.

Question 16

because ions are inherently either negative or positive what happens when they flow?

Answer 16

an electrical current

Question 17

what are chemical bonds?

Answer 17

links that join the atoms of matter together.

The forces that cause bonding between atoms is a result of the interactions between charged particles (positive protons and negative electrons)

Question 18

what is covalent bonding?

Answer 18

when atoms form chemical bonds by sharing electrons

Question 19

what is ionic or polar bonding?

Answer 19

when an ion that becomes more stable by losing electrons gives its electrons to an ion that becomes more stable by gaining electrons they become oppositely charged and there fore attracted to each-other and bonded. this is ionic bonding.

Question 20

what are the charge carriers that constitute electrical curent flow?

Answer 20

ions and electrons

Question 21

what is the mole?

Answer 21

a quantity, used in chemistry.

Question 22

what will be found in all materials resulting from a chemical reaction?

Answer 22

all of the atoms that we started with before the reaction took place

Question 23

can molecules be made up of different elements?

Answer 23

yes

Question 24

what is a atomic mole?

Answer 24

the graham atomic weight for atoms, more specificly, 6.02X10 to the 23rd power of anything.
example: 
atomic weight of sodium=23grams
sodium=Na23
1 mole of sodium=23 grams

Question 25

what is a mole of molecules?

Answer 25

the number of molecules in a gram molecule.

Question 26

what is the mass number?

Answer 26

the total number of protons and neutrons in a nucleus

Question 27

are atoms electrically positive?

Answer 27

no they are neutral

Question 28

what are 3 noble or inert gases?

Answer 28

helium, neon, and argon

Question 29

what are qualities of noble gasses and why?

Answer 29

they are very stable because their valence’s are full, this makes them show little tendency to enter into chemical reactions. they are seldom found in compounds

Question 30

what is the combining capacity?

Answer 30

the number of electrons an atom can gain, lose, or share in the forming of chemical bonds

Question 31

what is electron transfer?

Answer 31

it refers to the donating and receiving of electrons since both processes occur simultaneously

Question 32

what is a positive ion?

Answer 32

an atom that has given up an electron

Question 33

what are elements whose atoms readily give up electrons called?

Answer 33

Metallic

Question 34

what do most metals have in common atomically?

Answer 34

1 or 2 electrons in their outer most shell

Question 35

are all bonds covalent?

Answer 35

yes, electrons are being shared

Question 36

do purely ionic and purely covalent bonds exist in nature?

Answer 36

rarely