The electrons in the outer energy level
What are valence electrons?
A part of an atom with a negative charge
What is an electron?
The atomic number tells you
What is the number of protons (and electrons) an atom of an element has?
Atomic mass - Atomic number
What is the formula for finding the neutrons of an atom?
A subatomic particle with no charge.
What is a neutron?
The location of protons and neutrons.
What is inside the nucleus?
Elements are dull, brittle and insulator (non conductor)
What is non-metal physical properties?
Tiny particles that make up all matter.
What are atoms?
Oxygen O has 8.
What are protons and electrons?
The location of electrons.
What is outside the nucleus?
Columns on a periodic table
What are groups?
The maximum number of electrons the 2nd orbital, or energy shell, can hold.
What is 8.
Rows on the periodic table
What are periods?
Mass - atomic number =
What are neutrons?
Elements in the same group share this.
What are the same number of valence electrons
The maximum number of electrons the 1st orbital, or energy shell, can hold.
What is 2?
A part of an atom with a positive charge
What is a proton?
Elements that are shiny, malleable, and conduct electricity
What are metals?

What are Bohr diagrams.
Groups are in located in which directions.
What is vertical?
Found in a zigzag line on the periodic table.
What are metalloids?
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 this.
What are elements that are considered extremely reactive?
Subatomic particle are .......
What is electrons, neutrons, and protons.
Located on the right side of the zigzag line.
What are nonmetals?