Definitions
The sum of the number of protons and neutrons in an atoms nucleus
mass number
False, they cannot reside between orbits
The nucleus of an atom contains...
Protons and Neutrons
Describe the electron cloud model
Electrons exist in cloud regions around the nucleus rather than finite orbits.
What was Jesus' mothers name
Double Jeopardy
Mary
an element that is usually soft, not malleable or ductile, and a poor conductor of heat and electricity
nonmetal
A neutral atom contains more protons than electrons
false, they contain the same amount of protons and electrons
A neutral potassium atom has an atomic number of 19 and a mass number of 39. How many neutrons does potassium have?
20
How did Rutherford determine that most of an atom was empty space?
Double Jeopardy
Rutherford conducted the gold foil experiment. Many particles passed through but some bounced back.
Who slew Goliath
David
the center of an atom that contains protons and neutrons and is surrounded by an electron cloud
nucleus
Mendeleev arranged the periodic table according to atomic mass
True
Carbon belongs to what group on the periodic table
Double Jeopardy
Group IVA
How many protons, neutrons, and electrons does Kr have?
P=36, E=36 N=48
Who nailed his 95 theses to the church doors in Wittenburg, Germany on October 31, 1517. Effectively starting the Protestant Reformation
Martin Luther
the number of protons in one atom of an element
atomic number
Nobel gases are highly reactive because they have seven valence electrons
Double Jeopardy
False, they are unreactive because they contain 8 valence electrons
Who discovered the neutron?
James Chadwick
Draw an atom of oxygen to include all electrons in increasing energy levels
2 in first shell, 6 in outer shell
1 Brother
a vertical column of elements in the periodic table
Double Jeopardy
group
The listed weight of an atom is typically not a whole number because most elements have one or more isotopes
True
A neutral atom contains 17 protons, 17 electrons, and 18 neutrons. What is the atomic mass?
35
Draw the electron dot diagram for Aluminum. Will it most likely form a negatively charged atom or a positively charged atom when it reacts with another atom?
Positively charged atom
Did Mrs. Snider grow up riding dirt bikes or Quads?
Dirt Bikes