Periodic Table
Where are metals, non-metals, and metalloids located on the periodic table?
Left side, Right side, The zig zag
What are the 3 parts of an atom and their charge?
Proton (positive)
Neutron (no charge)
Electron (negative)
What are the two types of changes? give an example of both
Physical and Chemical changes
This symbol separates reactants and products and means “yields” or “produces.”
The arrow ->
What are the 3 states of matter and their particle arrangements
Solids, Liquids, Gases
Solids- tightly packed and fixed
Liquids- closely packed but not fixed
Gases- particles move freely
What are the horizontal rows on the periodic table called?
What are the vertical columns on the periodic table called?
Periods
Familys/Groups
where are the 3 parts of the atom located?
protons & neutrons: in the nucleus
electrons: the outer shell
This type of change alters the appearance or state of a substance but does not change its chemical identity
A physical change
This part of a chemical equation shows the substances that are formed after the reaction.
Products
What are physical and chemical properties of matter?
physical: These are characteristics of matter that can be observed or measured without changing the substance's identity.
Chemical:These describe a substance’s ability to change into a new substance through a chemical reaction
why might some elements be better for certain uses than others?
Physical properties, conductivity, cost, reactivity, malleability, etc.
This number identifies an element and equals the number of protons or electrons in its atoms.
The atomic number
When a substance changes into a new substance with different properties, this type of change has occurred
A chemical change
This part of a chemical equation shows the substances that react together.
Reactants
This process separates mixtures based on differences in particle size, such as using a filter to separate sand from water.
Filtration
Compare and contrast periods and families/groups
Elements with the same number of valence electrons are placed in the same family/group while elements with the same number of electron shells are grouped in the same period
This number represents the total number of protons and neutrons in an atom’s nucleus.
The mass number
This type of change releases energy, often in the form of heat or light, during the formation of new substances.
Exothermic chemical change
These small numbers written after elements in a chemical formula show how many atoms of each element are in a molecule
Subscripts
How does the atomic composition of elements, compounds, and mixtures differ? What are the two types of mixtures
Elements: Pure substances made of only one type of atom
Compound: Pure substances made of two or more different elements chemically bonded
Mixture: Combination of two or more substances not chemically bonded (homogenous & heterogenous)
How does the arrangement of elements on the periodic table help us understand their properties and predict their behavior?
The periodic table organizes elements by increasing atomic number and groups elements with similar properties into columns. This arrangement helps us see patterns in behavior, predict reactivity, and trends
Why aren’t all the subatomic particles used to determine the mass?
electrons aren't included because their mass is so small
During this chemical change, energy is absorbed to break chemical bonds before new ones form.
An endothermic reaction
This number placed before a chemical formula in an equation indicates how many molecules or moles are involved
coefficient
Name an Element, Compound, and Mixture
Answers will vary