Atomic Structure
Masses of Atoms
The Periodic Table
Metals, Nonmetals, & Metalloids
Misc.
People
100
What atomic structure has a negative charge?
electron
100
composed mostly of protons and neutrons in the nucleus
atomic mass or mass #
100
elements are organized in the periodic table by increasing atomic _________
number
100
identify the three regions the periodic table is divided into
metals, nonmetals, and metalloids
100
the number of ___________ identifies the element
protons
100
Who developed the 1st periodic table?
Dmitri Mendeleev
200
What particles are found in the nucleus?
protons and neutrons
200
determine what elements are represented by the following symbols: Au, Hg, Fe
Au = Gold
Hg = Mercury
Fe = Iron
200
Horizontal rows of the periodic table are called _____
periods
200
describe three properties of elements that are metal
shiny, good conductor of heat and electricity, solid at room temperature
200
Identify the three particles that make up an atom, along with their charges.
proton (positive)
neutron (no charge)
electron (negative)
200
discovered the nucleus with the gold foil experiment?
Ernest Rutherford
250
which has more energy--an electron closer to the nucleus or further away?
further away
250
what are smaller particles of atoms called?
quarks
250
What do elements in the same group have in common?
they have the same number of electrons in their outer energy level/shell
250
Which of the following is the best conductor: iodine, silver, silicon, or sulfer
silver
250
What are the elements in group 18 referred to as?
Noble Gases
250
Who arranged the periodic table by atomic number?
Henry G.J. Mosely
300
How are element names abbreviated in scientific shorthand on the periodic table?
First letter capitalized, and if there is a second letter it is lowercase
300
determine the mass number and atomic number of a chlorine atom that has 17 protons and 18 neutrons
atomic number is 17
atomic mass is 36
300
the first periodic table based on atomic mass was devised by _________
Dmitri Mendeleev
300
Classify the following elements as a metal, nonmetal, or metalloid: Carbon, Boron, Sodium
Carbon--nonmetal
Boron--metalloid
Sodium--metal
300
vertical columns in the periodic table are called ______
groups
300
cut stones in half until they could no longer be divided
Democritus
400
smallest piece of matter that still has the properties of the element
atom
400
if the atomic number is 5 and the mass number is 10, how would you determine the number of neutrons
to find the number of neutrons, subtract the atomic number from the mass number; 10-5=5 neutrons
400
determine the group AND period of the element gold
group 11, period 6
400
What is the only metal found in liquid state at room temperature?
Mercury
400
explain the significance of the noble gases
exist as isolated atoms in nature; outer energy level is filled=stable
400
theory stated that all matter is made of indivisible atoms
John Dalton
500
current model, which shows electrons traveling in specific energy levels around a nucleus
electron cloud model
500
atoms of the same element that have different numbers of neutrons
isotopes
500
explain what elements in the same period have in common
same number of energy levels
500
elements in Groups 3 through 12 of the periodic table are called the _________ elements
transition
500
draw an electron dot diagram for Al
500
plum pudding model
J.J. Thompson