VOCABULARY
A _______________ _____________________a substance that can conduct electric current under some conditions.
SEMICONDUCTOR
What happens to the number of valence electrons as you move from left to right across a row or period in the periodic table?
a.increase
b.decrease
c.stay the same
A. INCREASE
_______The one- or two-letter abbreviation of an element on the Periodic Table is called it’s
a)short form
b)symbol
c)contraction
B) SYMBOL
In general, which of the following statements about metals is true?
a)Most metals are a coppery or goldish color at room temperature
b)Metals are malleable and can carry an electric current
c)Metals tend to look dull rather than lustrous
b)Metals are malleable and can carry an electric current
_______ At room temperature, more than half of the nonmetal elements are
a)Liquids
b)Gases
c)Solids
c)Solids
A ______________________ is a term used to describe a material that can be hammered or rolled into flat sheets. Example- aluminum foil
MALLEABLE
________ What happens to the number of energy levels (shells) as you move down a group or column on the periodic table?
a.increase
b.decrease
c.stay the same
A. INCREASE
_______ Back in 1869, Dmitri Mendeleev discovered patterns in the properties of elements when he arranged them in order…
a)alphabetically
b)by their number of protons
c)by their atomic masses
C) BY THEIR ATOMIC MASSES
What are 3 examples of metals? Use the periodic table (Color Version)
Ex. aluminum, magnesium, sodium
The elements that do not ordinarily react to form compounds are…
a)alkali metals
b)halogens
c)noble gases
c)noble gases
_____________ is the ease and speed with which an element combines, or reacts, with other elements and compounds. Example- Hydrogen is highly reactive which is why the Hindenburg burst into flames.
REACTIVITY
14. ________ The second energy level (L shell) of an atom can hold a maximum of ___ electrons.
a. 18
b. 8
C.2
B. 8
What element is in group 2, period 3? ______________________
MAGNESIUM
What are 4 physical properties of metals?
luster, malleability, ductility, thermal conductivity, electrical conductivity
10. Which of the properties in the list to the right could be the properties of a non-metallic element?
List 3 letters:
a.Good conductor of electricity
b.Easily breaks when hammered
c.Yellow-green in color
d.Solid at room temperature
B,C,D
A material that can be pulled out into a long wire is _________. Example- barbed wire
DUCTILITY
15. Draw a Lewis Dot Diagram for Aluminum.
The chemical symbol is AL and there should be 3 dots around it. Remember to pair them first.
What element is in group 6, period 4? ______________________
CHROMIUM
___________ ____________are the electrons that are in the highest energy level of an atom and that are involved in chemical bonding
VALENCE ELECTRONS
A column on the periodic table is also called…
a)a group
b)a period
c)a row
A) A GROUP