atoms and the periodic table

Question 1

proton

Answer 1

located in the nucleus, charge of +1, mass of 1

Question 2

neutron

Answer 2

located in the nucleus, charge of 0, mass of 1

Question 3

electron

Answer 3

located outside nucleus in energy levels, charge of -1, mass of 0

Question 4

nucleon

Answer 4

particles found in nucelus

Question 5

nucelus

Answer 5

area where protons and neutrons are located, necessary in atoms

Question 6

isotope

Answer 6

atoms of the same element that have a different number of neutrons

Question 7

group

Answer 7

18 vertical columns of the periodic table

Question 8

period

Answer 8

7 horizontal rows of the periodic table

Question 9

valence

Answer 9

electron in the outermost energy level

Question 10

metal

Answer 10

shiny, malleable, ductile, conduct electricity

Question 11

non-metal

Answer 11

don’t conduct electricity, most are gases at room temperature

Question 12

metalloid

Answer 12

have some of the properties of metals and nonmetals, sometimes conduct electricity

Question 13

alkali metal

Answer 13

group 1, very reactive

Question 14

alkaline earth metal

Answer 14

group 2, very reactive, don’t occur in nature naturally

Question 15

transition metal

Answer 15

in the middle of the table

Question 16

halogen

Answer 16

group 17, extremely reactive, mostly gases

Question 17

noble gas

Answer 17

group 18, least reactive,

Question 18

atomic number

Answer 18

number of protons- defines element, lower left corner

Question 19

atomic mass number

Answer 19

number of neutrons + protons- how much mass an atom’s nucleus has, upper left corner

Question 20

average atomic mass

Answer 20

average mass of the mixture of isotopes

Question 21

abundance

Answer 21

amount of isotopes that occur in an element

Question 22

periodicity

Answer 22

repeating patterns we see when elements are organized a certain way

Question 23

atomic radius

Answer 23

how big an atom is, depending on what period that affects the size

Question 24

chemical property

Answer 24

a property of a substance that is observed during a reaction when the substance is changed

Question 25

physical property

Answer 25

a property of a substance that you can observe from the outside