Periodic Table 1
The electrons in the outer energy level are called ______________.
What are valence electrons?
An subatomic particle with a positive charge is called a _________.
What is a proton?
The atomic number tells you
What is the number of protons (and electrons) an atom of an element has?
A subatomic particle with a negative charge is called an ___________.
What is an electron?
A subatomic particle with no charge is called a ____.
What is a neutron?
Protons and neutrons are located _______.
What is inside the nucleus?
Is an atom with a completely full outer most (valence) energy level highly reactive or nonreactive?
What is nonreactive?
Tiny particles that make up all matter.
What are atoms?
Found in a zigzag line on the periodic table.
What are metalloids?
What is outside the nucleus?
Atomic mass - Atomic number is the formula for finding the number of _____________.
What is the formula for finding the neutrons of an atom?
Does reactivity increase or decrease as you move Left --> Right on the Periodic Table?
(From the Hydrogen column across to the Helium column)
Decrease
Rows on the periodic table
What are periods?
Columns on a periodic table are called _______.
What are groups?
Elements in the same group share this.
What are the same number of valence electrons
These are the properties of nonmetals.
What are brittleness, low boiling/melting points, dull, not ductile or malleable, poor conductors?
These are the properties of metals.
What are conductivity, high melting points, most are solids at room temperature, shiny, ductile, and malleable?
The majority of the elements on the periodic table are this.
What are metals?
These are the properties of metalloids.
What are many properties of both metals and nonmetals?
The three classes of elements are these.
What are metals, metalloids, and nonmetals?
Most metals at room temperature are this.
What are solids?
The modern periodic table is organized according to this.
What are by increasing atomic number?
Elements in group 1 have only 1 valence electron and are considered ___________.
(extremely reactive or nonreactive?)
What are elements that are considered extremely reactive?
The reactivity of an element is dependent on this.
What is the ability of an atom to either completely fill or empty its outer most energy level?
Located on the right side of the zigzag line.
What are nonmetals?