Chemistry 1
A reaction that feels cold is called what?
An endothermic reaction.
When two or more atoms are joined together chemically they have made a ....(can be the same element)
What is Molecule
Is the water is a saltwater solution the solute or the solvent?
What is solvent?
---------- is known as the universal solvent
What is Water
ice is an example of a
What is Solid
What reaction has reactants have more energy than products and they feel hotter?
What is Exothermic?
what chemical reaction do plants do to make food from sunlight?
photosynthesis
A substance formed by chemically combining two or more atoms of different elements is known as
What is Compound
What type of reaction is this:
A + AB ----> AB
a) double replacement
b) decomposition
c) synthesis
Synthesis.
Giving off heat or light is a clue that this type of a change is occuring.
What is a chemical change?
Water is made of these two elements?
What is hydrogen and oxygen?
What are the four variables that affect reaction rate?
What is Concentration, Surface Area, Temperature, and Catalysts?
What term refers to anything that occupies space, physical and chemical properties and exists in gas, liquid or solid form
What is Matter
All matter exists in three forms solid, liquid and
What is Gas
The elements can be found on the right side of the periodic table of the elements.
What are noble gasses?
There are this number of elements on the periodic table of the elements.
What is 118?
Water is an example of
What is Liquid
How does increasing temperature affect the movement of molecules?
What is molecules move faster?
Elements represent unique forms of these little thingies. The building blocks of everything!
What are atoms.
When one chemical changes its state of matter, the change is called
What is Physical Change
The atomic number tells us this.
What is the number of protons?
How many periods are there on the periodic table?
What is seven?
Neon and Argon are examples of
What are Gases
Substance that contains space and mass
What is Matter
This is the smallest type of atom.
What is Hydrogen.
What type of change occurs when ice melts to water
What is Physical
What type of reaction is this?
AB -----> A + B
What is Decomposition?
What is a valence electron?
The number of electrons on the outside of the atom.
What elements are steel made of?
What is C and Fe?
What is the formula for density?
mass/volume
Atoms bond together to form these.
What are molecules?
When a substance gains oxygen, the substance is called:
a) Oxidized, b) magnesiumed, or c) coppered?
What is Oxidized
What type of reaction is this?
CxHy + O2 ----> CO2 + H2O
a) synthesis
b) decomposition
c) combustion
What is combustion?
What is an intermolecular force?
The bonds between atoms.
What do enzymes do?
Speed a chemical reaction
Most of the periodic table is made of what?
metals