A mixture of facts!
The person who first published a periodic table in 1869 which was arranged in increasing atomic mass. Gaps were left for elements not discovered yet.
Who was Dmitri Mendeleev?
This class of elements falls along the "staircase" on the periodic table. Their behavior can be changed by using mixtures. Such mixtures make excellent computer chips and are called semiconductors.
metalloids
Each period of the periodic table corresponds to a(an) _______ ______ and there are a total of _________ of them.
What is an energy level; 7.
Do metals tend to have higher or lower electronegativities?
low
As you move from left to right across a period, the first ionization energies do what?
What is "increase?"
What is the symbol for gold?
What is Au?
Name that element: period 5, group 14
What is tin?
The horizontal rows of the periodic table are called_______.
periods
Which ion will have the larger radius: Na+ or K+?
K+
Which will have the larger radius: a F atom or a F- anion?
What is a F- anion?
The periodic table is arranged in order of increasing ______ ______.
What is atomic number?
This class of elements have high luster, are good conductors, and are solid at room temperature (except for 1.)
metals
For group 2 elements, which sublevel are the valence electrons located in?
s
This is the energy (in KJ/mol) that is required to remove an electron from an atom.
What is "ionization energy?"
The ability of an atom to "pull on" other electrons that are shared in a bond.
What is "electronegativity?"
The ________ __________ states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
What is the periodic law?
This group of metals contains groups 3-12 and are also called the d block.
What are the transition metals?
What do elements of the same periodic periods have in common?
principle (n) energy levels
What is the general trend for electronegativity and electron affinity as you go down a group?
What is "They both decrease".
Arrange these elements from smallest to largest atomic radii: As, Ti, Ca, Br.
What is Br < As < Ti < Ca
Elements in the same _________ have similar chemical properties because they have the same number of _________ electrons.
What is "group" and "valence"?
These elements are found in the second row of the f-block elements and are part of the inner transition metals.
What are the actinides?
The number of valence electrons for the halogens is always ______. They need ________ (a number) electron(s) to have an octet (8) of valence electrons and be stable like them! (Except for small helium, of course!)
What is 7 and 1?
Why does the atomic radius generally increase moving down a group of elements?
The number of occupied energy levels increases so the effective nuclear charge decreases (because there are more core electrons which increases the shielding effect.)
Arrange these 5 elements in order of smallest to largest first ionization energy (in KJ/mol):
At, Br, Cl, F, I.
What is At < I < Br < Cl < F