Atomic Structure
What is the smallest particle of an element that has properties of that element.
Atom
A _______________ is a pure substance made up of only one type of atom.
Ex. Gold, Neon, Hydrogen
element
What law states that mass/matter is neither created nor destroyed?
Law of Conservation of Mass/Matter
Period
How do we determine the number of energy levels an atom has for its electrons?
Period #
What subatomic particle(s) can be found in the nucleus?
Protons and Neutrons
What type of elements have properties of both metals and nonmetals?
What type of change occurs when NO new substance is formed as a result?
Physical Change
A vertical column on the periodic table is known as what?
What group contains the most reactive elements on the periodic table?
Group 1-Alkali Metals
What type of subatomic particle(s) are found outside of the nucleus on different energy levels?
Electrons
What are atoms of the same element that have different numbers of neutrons?
Ex. Oxygen-17 & Oxygen-18
Isotopes
What type of change occurs when matter undergoes a reaction and a new substance with new properties is created?
Chemical Change
The number of protons in the nucleus of an atom is referred to as what?
Atomic Number
Hydrogen is in group 1, however, hydrogen has different properties than the other elements in group 1. How does hydrogen differ from the other elements in group 1?
Hydrogen is a nonmetal and all other elements in group 1 are metals.
In a neutral atom, the number of protons is equal to the number of __________________.
Electrons
What type of elements are poor conductors of heat and electricity, dull in appearance and brittle?
Nonmetals
Grace places a piece of wood, an iron nail and a styrofoam cup into a bucket of water and observes that the nail sinks to the bottom, the wood floats just under the surface, and the cup floats on top of the water. What property is being demonstrated by this experiment?
Density
Name an element that has similar chemical properties to Nitrogen.
Any elements in the same group as nitrogen for this: Phosphorous, Arsenic, Antimony, Bismuth, Moscovium
Groups 3-12 in the middle of the periodic table are referred to as what?
How is the atomic mass of an atom determined?
Add together the # of protons and neutrons in the nucleus
What type of elements are the LEAST reactive on the periodic table?
Noble Gases (Group 18)
When you mix together baking soda and vinegar, the mixture beings to bubble and fizz. What type of change has occurred?
Chemical Change
How many valence electrons to elements in Group 14 have?
If 115 g of a substance reacts with 84 g of another substance, what will be the mass of the products after the reaction?
199 g