Properties of Atoms and the Periodic Table

Question 1

neutron quarks

Answer 1

two down, one up

Question 2

number of existing quarks

Answer 2

six

Question 3

quarks are studied by…

Answer 3

charging accelerated particles with protons, this leaves tracks in the bubble chamber

Question 4

elements are classified as…

Answer 4

metals, nonmetals, metalloids (semimetals)

Question 5

electron dot diagram

Answer 5

uses the element’s symbol and dots to represent valence electrons

Question 6

energy levels

Answer 6

2, 8, 18, 32, 32, 18, 8

Question 7

amu (unit of measurement)

Answer 7

1/12 of a carbon atom, six protons and six neutrons

Question 8

sixth quark

Answer 8

top quark

Question 9

mass of an atom (abbreviation, what is it)

Answer 9

amu, composed of neutrons and protons

Question 10

elements are arranged in…

Answer 10

increasing atomic number

Question 11

isotopes

Answer 11

same element (number of protons and neutrons), different number of elements

Question 12

quarks

Answer 12

make up protons and neutrons

Question 13

helium and hydrogen are…

Answer 13

the building blocks for naturally-occurring elements

Question 14

mass number

Answer 14

equals the number of protons + the number of neutrons

Question 15

proton quarks

Answer 15

two up, one down

Question 16

masses (of structures of an atom)

Answer 16

proton - 1 amu
neutron - 1 amu
electron - 1/1836 amu

Question 17

elements are abbreviated in…

Answer 17

scientific shorthand

Question 18

nucleus

Answer 18

positively charged center of an atom, contains most of atoms mass

Question 19

the size of the ______ ________ determines the size of the _______

Answer 19

electron cloud, atom

Question 20

higgs bosom

Answer 20

quarks, leptons, forces

Question 21

quark names

Answer 21

up, down, top, bottom, charm, strange

Question 22

element abbreviation

Answer 22

first letter or two of an elements name

Question 23

atom

Answer 23

the smallest piece of matter that still has the properties of an element

Question 24

charges

Answer 24

proton - +
electron - -
neutron - (neutral)

Question 25

location

Answer 25

protons and neutrons - in the nucleus, electrons surrounding the nucleus (electron cloud)

Question 26

elements are __________ in labs all over the world

Answer 26

synthesized

Question 27

number of neutrons =

Answer 27

atomic mass - atomic number

Question 28

average atomic mass

Answer 28

weighted-average mass of an elements isotope, closest to most abundant

Question 29

vertical

Answer 29

18 columns, families/groups

Question 30

horizontal

Answer 30

seven rows, periods

Question 31

supernovas…

Answer 31

spread heavier elements across the universe

Question 32

locations (m, nm, m)

Answer 32

metals - left
nonmetals - right
metalloids - line

Question 33

organization of the periodic table

Answer 33

1800s - arranged by atomic mass
1900s - arranged by atomic number

Question 34

the model of an atom…

Answer 34

is still changing over time.

Question 35

representing atoms (models)

Answer 35

scientists use scaled-up solid models (spheres)

Question 36

rutherfords experiment

Answer 36

gold foil, discovered nucleus and the space between the electrons

Question 37

what do family/groups represent

Answer 37

similar chemical properties, valence electrons

Question 38

calculate average atomic mass

Answer 38

ex)

4/5(11)+1/5(10)=10.8
Boron-11 (most abundant)

Question 39

why is hydrogen-1 unusual

Answer 39

it has no neutrons, only one proton