Chapter 3

Question 1

any particle found in the nucleus of an atom (protons and neutrons)

Answer 1

nucleon

Question 2

the combined number of protons and neutrons in the nucleus of an atom

Answer 2

mass number

Question 2

region of space in an electron subshell where an electron is most likely to be found. each one can accomodate 2 electrons. specific shell and subshell combo (1s, 2p, etc)

Answer 2

electron orbital

Question 2

column 3 to metalloids (stair step). can form different charged ions. except Al is an active metal

Answer 2

transition metals

Question 3

diatoms

Answer 3

elements that exist as 2 atoms bonded together. HOFBrINCl

Question 4

periodic law

Answer 4

when elements are arranged in order of increasing atomic number, elements with similar chemical properties occur at periodic (regular) intervals

Question 4

the blocks of columns on the periodic tabe. s, p, d, f. space in an electron shell that contains electrons with the same energy

Answer 4

electron subshell

Question 5

alkali earth metals / active metals

Answer 5

2nd group. soft, shint metals the only moderately react with water. can onl form +2 ions

Question 5

isotopes

Answer 5

atoms with the same number of protons and electrons but different number of neutrons. have the same chemical properties but different physical properties because they have different masses

Question 6

electron orbital

Answer 6

region of space in an electron subshell where an electron is most likely to be found. each one can accomodate 2 electrons. specific shell and subshell combo (1s, 2p, etc)

Question 8

Noble metals

Answer 8

family 11. limited reactivity because their d subshell is full

Question 9

transition metals

Answer 9

column 3 to metalloids (stair step). can form different charged ions. except Al is an active metal

Question 10

nonmetal

Answer 10

an element without the properties of luster (shiny), thermal (heat) and electic conductivity and malleability (can be hammered into sheets). these account for only 23 of the elements

Question 11

nucleon

Answer 11

any particle found in the nucleus of an atom (protons and neutrons)

Question 12

mass number

Answer 12

the combined number of protons and neutrons in the nucleus of an atom

Question 13

an element without the properties of luster (shiny), thermal (heat) and electic conductivity and malleability (can be hammered into sheets). these account for only 23 of the elements

Answer 13

nonmetal

Question 14

element with properties of luster (shiny),thermal (heat) and electric conductivity and malleability (can be hammered into sheets). all elements but 23 are these

Answer 14

metal

Question 15

2nd group. soft, shint metals the only moderately react with water. can onl form +2 ions

Answer 15

alkali earth metals / active metals

Question 16

energy level of the electron, rows of the periodic table. how far away the electron is from the nucleus. 1, 2, 3, 4

Answer 16

electron shell / valence energy shel

Question 18

lanthanides and actinides

Answer 18

inner transition metals

Question 19

can act as a metal or nonmetal, depending on what it bonds to. Si is most common (very light) in computer chips

Answer 19

metalloids

Question 20

metalloids

Answer 20

can act as a metal or nonmetal, depending on what it bonds to. Si is most common (very light) in computer chips

Question 21

inner transition metals

Answer 21

lanthanides and actinides

Question 23

alkali metals / active metals

Answer 23

first group. soft, shiny metals that readily react with water. can only form +1 ions

Question 23

octet rule for first row of periodic table

Answer 23

duet rule

Question 25

the calculated average mass for all the isotopes of an element

Answer 25

atomic mass

Question 26

electron shell / valence energy shel

Answer 26

energy level of the electron, rows of the periodic table. how far away the electron is from the nucleus. 1, 2, 3, 4

Question 27

metal

Answer 27

element with properties of luster (shiny),thermal (heat) and electric conductivity and malleability (can be hammered into sheets). all elements but 23 are these

Question 28

elements that exist as 2 atoms bonded together. HOFBrINCl

Answer 28

diatoms

Question 29

atomic mass

Answer 29

the calculated average mass for all the isotopes of an element

Question 30

duet rule

Answer 30

octet rule for first row of periodic table

Question 31

halogen

Answer 31

family 17. reactive elements that are gases at room temp or become gases at slightly above room temp

Question 32

electron subshell

Answer 32

the blocks of columns on the periodic tabe. s, p, d, f. space in an electron shell that contains electrons with the same energy

Question 33

when elements are arranged in order of increasing atomic number, elements with similar chemical properties occur at periodic (regular) intervals

Answer 33

periodic law

Question 35

first group. soft, shiny metals that readily react with water. can only form +1 ions

Answer 35

alkali metals / active metals

Question 36

atoms with the same number of protons and electrons but different number of neutrons. have the same chemical properties but different physical properties because they have different masses

Answer 36

isotopes

Question 37

family 17. reactive elements that are gases at room temp or become gases at slightly above room temp

Answer 37

halogen