Vocabulary
A reaction that absorbs heat, causing a decrease in the temperature to it's surroundings.
Endothermic
Atoms or molecules interacting together at the beginning of a reaction (left side of the chemical equation) are called:
Reactants
The atoms or molecules produced in a reaction
Product
75% of all elements are classified as what on the periodic table?
Metals
The science word for a substance's characteristic is called
property
A reaction that releases heat, causing an increase in temperature to it's surrounding areas.
Exothermic
What type of change is ripping a piece of paper considered?
Physical Change
True or False: A substances state of matter can change from one form to another during a chemical reaction.
True
Where are nonmetals found in the periodic table?
On the far right
What state of matter is water at room temperature?
Liquid
Atoms of the original substance rearrange into one or more new substances that have different properties from the original substance
Chemical Reaction
What type of change is baking bread considered as?
Chemical Change
Atoms that bond together form what?
Molecules
Elements that have properties of both metals and nonmetals are called what?
Metalloids
Halogens
A change that does not affect the chemical structure of a substance
Physical Change
What are the reactants in the equation:
H2 + O --> H2O
H2 and O
What are the products in the equation:
H2 + O --> H2O
H2O
The atomic number is determined by the number of _______ in the atom
protons
How is the periodic table organized by from left to right, top to bottom?
By atomic number
A change that rearranges the chemical structure of a substance through a chemical reaction
Chemical change
What is the product of this equation:
Ca + Cl2 → CaCl2
CaCl2
What are the reactants of this equation:
Ca + Cl2 → CaCl2
Ca and Cl2
How do you figure out the atomic mass of an element by only knowing the amount of subatomic particles AND not having a periodic table to look at ?
protons + neutrons = atomic mass
Matter is neither created nor destroyed is called:
The Law of Conservation of Matter