Category 1
Chart that arranges elements having similar properties into the same groups
What is the periodic table?
Attractive force that holds the nucleus together
What is strong force?
Shells that surround the nucleus
What are electron energy levels?
Electrons have this charge
What is negative?
Period numbers give you this information
What is the number of energy levels?
Green represents these on the periodic table
What are nonmetals?
Blue represents these on the periodic table
What are metalloids?
Two or more atoms joined together
What is a molecule?
The three particles all elements have
What are protons, neutrons, and electrons?
Substance made of only one atom
What are elements?
The horizontal rows on the periodic table, it indicates number of energy levels.
What are periods?
Orange represents these on the periodic table
What are metals?
Elements in the same [blank] react similarly.
What is family?
The lower number on the chart. It is the sum of protons and neutrons
What is atomic mass?
It is used to predict the formulas of molecules
The vertical columns, also called chemical families
What are groups?
The upper number on the chart, also number of protons and electrons.
What is the atomic number?
The periodic table identifies the atomic number, symbol, and these two items.
What are atomic mass and element’s name?
The formula to find the number of neutrons in an element.
What is atomic mass-atomic number=neutrons?
These electrons cause elements to react.
What are valence electrons?
The property that can either be positive, negative or neutral
What is electrostatic charge?