Periodic Table 1
These are the properties of metals.
conductivity, high melting points, most are solids at room temperature, shiny, ductile, and malleable
The period number tells you
What is # of energy levels?
The semi-conductors on the periodic table are classified as
Metalloids
The columns on a periodic table are called this.
groups
Elements in Group 2 have this many valence electrons
what is two
The name of the electrons involved in chemical reactions.
Valence electrons
The electrons in the outer energy level are called this.
valence electrons
The atomic number tells you this.
the number of protons
The reactivity of an element is dependent on this.
the ability of an atom to either fill or empty its outermost energy level
Isotopes are atoms of the same element with different number of...
neutrons
The person known for creating the periodic table
Who is Mendeleev?
the elements in the periodic table are arranged according to
increasing atomic number
Group 17 contains highly reactive nonmetals with seven valence electrons that tend to react violently with alkali metals and are more commonly known as this.
halogens
What noble gas does not have 8 valence electrons
What is Helium?
Elements in the same group share this.
same number of valence electrons
These are the properties of nonmetals.
brittleness, low boiling/melting points, dull, and are good insulators
Group 18 elements are extremely nonreactive nonmetals known as this.
noble gases
Extremely reactive elements in group 1 have only 1 valence electron and are known as this.
alkali metals
The rows on a periodic table are known as this.
periods
The three classes of elements are these.
metals, metalloids, and nonmetals
An unknown metal is extremely soft, silvery grey and very reactive when floated on water. It is likely that the unknown metal belongs to this group of elements.
group 1 or alkali metals
This element is the only one in the group that belongs with the group # (due to having the same # of valence e-) but not with the group name (it has a different classification)
What is hydrogen
The two ways to write an isotope
The hyphen form
The nuclear form
The two sub groups in transition metals
Actinides and Lanthanides
Very reactive elements in group 2 have only 2 valence electrons and are known as this.
alkaline Earth metals