Periodic Table 1
The electrons involved in chemical reactions are these.
What are valence electrons?
The electrons in the outer energy level are called this.
What are valence electrons?
Elements in the same group share these characteristic
What are chemical and physical properties?
The noble gases share this characteristic with regard to their atomic structure.
What are full energy levels?
This compound is used to flavor food.
What is sodium chloride?
The three classes of elements are these.
What are metals, nonmetals and metalloids?
An atom with a completely full outer most (valence) energy level is this.
What is unreactive?
Metalloids are known to have this property which concerns the ability to conduct heat and electricity at certain temperatures.
What is semiconductor?
The reactivity of an element is dependent on this.
The number of valence electrons it has
This makes up about 80% of the air we breathe
What is nitrogen
water molecules are attracted to each other which forms this.
What is surface tension?
Mendeleev first organized the elements of his periodic table according to this.
What is increasing atomic mass?
The reactive elements in group 2A are known as this.
What are alkaline earth metals?
This is the trend on the periodic table from left to right among the metals.
What is goes from more reactive to less reactive
This metal in the boron group is used for aircraft parts
What is aluminum
These are the properties of metals.
What are shiny, malleable, good conductors.
Group 18 elements are extremely nonreactive nonmetals known as this.
What are noble gases?
Extremely reactive elements in group 1 have only 1 valence electron and are known as this.
What are alkali metals?
Nonmetals have these properties
dull, brittle, non-conductors
Cement and chalk are compounds of this
What is calcium
This class of elements have properties of both metals and nonmetals.
What are metalloids?
The first energy level/shell/orbital location is
What is closest to the nucleus?
When two elements combine, they form this.
What is a compound?
An element with 2 energy levels would be in this period.
What is Period 2
Diamond and soot are form of this
What is Carbon