Everything atoms
A neutral atom of Lithium has ______ number of electrons
What is three?
Positively charged particle
What is a proton
Columns and rows on the periodic table are called _________ and _________
What are groups and periods?
Electrons in the outermost shell
What are valence electrons?
Indicates number of atoms of each element in a chemical formula
What is a subscript?
You subtract _________ from atomic mass to find number of neutrons
What is atomic number?
Negatively charged particle
What is an electron?
There are _______ groups and ________ periods on the periodic table
What are 18 and 7
Electrons allowed in 1st energy level
What is two?
Five indicators of chemical reactions are ________, _________, ________, __________, _________
What is production of light, production of gas, formation of precipitate, change in temperature, change in color
Substance made of two or more different atoms
What is a compound?
Neutral charged particle
What is a neutron?
Groups in the periodic table determine the ____________
What are valence electrons?
Electrons allowed in 2nd and 3rd energy level
What is eight?
Most reactive non-metals are found in group ____
What is group 17 or 7A?
Law that states mass is not created or destroyed
What is the Law of conservation of mass?
Structure where protons and neutrons exist
What is the nucleus?
Periods determine the number of _________
What are energy levels?
Protons determine ________ of an element
What is identity.
Elements that are not reactive and have full valence shell are found in group _____
What is group 18 or 8A?
In a neutral atom the number of protons equals number of ________
What is electrons?
Location of electrons
What is the electron cloud?
Most reactive metals are found in group ______
What is group 1?
Valence electrons determine ________ of element
What is chemical reactivity?
Sb, As, Si, Ge are ________
What are metalloids?