Atomic Structure
Periodic Table Basics
Families of Elements
Using Moles
Miscellaneous
100
What do we call electrons in the outermost energy level?
valence electrons
100
What do we call the vertical columns on the periodic table?
groups or families
100
Which is the least reactive group on the periodic table?
Noble gases or inert gases in group 18.
100
What do we call the mass of a mole of an element?
Molar mass
100
If an element has a nucleus so large that it tends to fall apart and form new elements while releasing energy, we say it is:
radioactive
200
Which subatomic particle orbits the nucleus?
electrons
200
What do we call the horizontal rows on the Periodic Table?
Periods
200
Halogens, when bonded with almost any other element, will create:
Salt
200
Calculate the molar mass of Polonium, which has an average atomic mass of 208.9824.
1 mol Po = 208.98g
200
What do we call elements that have the same number of protons, but different numbers of neutrons?
Isotopes
300
Which subatomic particle is positive? Which is negative? Which is neutral?
Protons are positive. Electrons are negative. Neutrons are neutral.
300
If an element has 6 valence electrons, what charge will its ion have?
2-
300
Where are the rare earth elements found on the Periodic Table?
Bottom 2 rows
300
Calculate the molar mass of Argon which has an average atomic mass of 39.948.
1 mol Ar = 39.95g
300
What do we call a positive ion? What do we call a negative ion?
Cations are positive ions, which gave away electrons. Anions are negative ions, which gained electrons.
400
Which two subatomic particles have the same mass?
Proton and neutron
400
If an atom has a mass number of 9 and an atomic number of 4, how many protons, neutrons, and electrons does it have?
Protons = 4 Electrons = 4 Neutrons = 9-4 = 5
400
If an element is found to the left of the zig zag line, it must be a:
Metal
400
How are a mole and a dozen alike? How are they different?
A mole and a dozen are both convenient counting units. They are different because a dozen is 12 and a mole is 6.02 x 10^23
400
Name 2 parts of Dalton's Atomic Theory.
All matter is made of atoms, that cannot be divided. Atoms of the same element are alike, and different elements are different. Atoms of different elements combine to form molecules.
500
What do we call the region in an atom where electrons are likely to be found?
Orbital or electron cloud
500
If an atom has an atomic number of 9 and an average atomic mass of 18.9984032, what is the number of protons, electrons and neutrons?
Protons = atomic number = 9 Electrons = atomic number = 9 Neutrons = ROUNDED average atomic mass - atomic number= so 19 -9 = 10 NEUTRONS
500
What do we call elements that have properties of both metals and non metals and which touch the zig zag line?
Semiconductors or metalloids
500
If you have 4 moles of carbon, how much would that weigh?
1 mol C = 12.01g 4 mol C (12.01g/1mol C) = 48.04g
500
Why is the average atomic mass usually a decimal but the atomic number is always a whole number.
Average atomic masses are AVERAGES of all the isotopes in nature. Atomic numbers are just the number of protons, and those are always whole.
M
e
n
u