Elements, Mixtures and compounds
The smallest unit of matter which has properties of a chemical element.
What is an atom?
These are the ingredients of a reaction; they are on the left side of the arrow.
What are reactants?
The subatomic particles (the parts of an atom.)
What are protons, neutrons, and electrons.
Matter can neither be _____________ nor ______________.
What is created, destroyed OR made, lost.
This tells the number of protons in an atom.
What is the atomic number?
Write the number of electrons each shell can hold up the the 4th shell
What is 2,8,18,32?
What can be done to a mixture that cannot be done to a compound?
What is a separated physically?
A process that involves the rearrangement of atoms to form new substances.
What is a chemical reaction?
The inner part of an atom, composed of protons and neutrons.
What is the nucleus.
In a ____________ system, all the matter stays inside.
What is closed?
Anything that has mass and takes up space is a kind of
What is matter?
Explain how you find the number of VALENCE electrons in an element
What is the group/family number?
Hydrogen and Neon are examples of what state of matter at room temperature.
What is a gas?
The symbolic representation of a chemical reaction using symbols and chemical formulas.
What is a chemical equation?
The charge of an electron.
What is negative.
The number placed below after a symbol in a chemical reaction is called
What is a subscript?
These cannot be broken down into simpler substances; everything around us is made up of combinations of them.
What are elements or atoms?
NaCl
What is the chemical formula for salt?
Soil and air are examples of what type of material.
What are mixtures?
This kind of reaction absorbs energy. (Heat enters.)
What is endothermic?
The charge of a neutron.
What is no charge or neutral.
List at least 3 indicators of a chemical change.
What are color change, gas is produced (smell or bubbles or fizz), a solid is formed, bright light or temperature change, etc.
The study of matter and how it changes is called
What is chemistry?
C on the periodic table
What is carbon?
How could you isolate salt from sea water?
What is heat it, boil it or let it evaporate. (Any one of these are correct!)
Every chemical reaction involves a change in
What is bonds, energy, etc.?
Atoms share these when they bond.
What are electrons?
The amount of matter stays the same in the reactants and products for ____________ chemical reactions.
What is all or every.
The smallest unit of a compound is called
What is a molecule?
Au
What is gold?