atoms
These are the building blocks of matter.
What are atoms?
A block of iron rusting shows an example of this kind of change.
What is a chemical change?
This law states matter can't be created nor destroyed.
What is the law of conservation of matter?
this determines the atomic number of an element
what is a proton
Is 1h+o -> h+o balanced or unbalanced?
what is balanced?
These particles stay inside the nucleus.
what are protons and neutrons
Melting, evaporating, and freezing are three signs that this change is occurring.
What is a physical change?
This is anything that has mass/ that takes up space.
What is matter?
The scientific term for columns in the periodic table.
what are groups in a periodic table?
Is this equation balanced? 2kr+Eu2+U--> 2kr2Eu+U
what is unbalanced
These particles move rapidly around the nucleus.
what are electrons
Dissolving salt in water is an example of this kind of change.
What is a physical change?
These are the states of matter.
what is gas, solid, liquid, plasma
The scientific term for rows in the periodic table.
what are periods in a periodic table?
Is 4Fe+3O2--> 2Fe203 balanced, or unbalanced?
What is balanced
While they make up nearly all the mass, protons and neutrons are 1,836 times heavier then these tiny subatomic partials.
What are electrons?
The process of baking a cake is an example of these changes.
What is a chemical change?
the smallest unit that defines a chemical element
what is an atom
this is what the groups show in the periodic table.
what is the number of valence electrons.
what is balanced
Radioactive versions of elements have the same number of protons but different numbers of these in their nucleus.
What are neutrons?
Eating food is an example of these changes.
What is both a chemical change and a physical change?
(Explanation: chewing is a physical change but the enzymes in your saliva and stomach acid break it down causing a chemical change.)
a type of mixture where one substance dissolved into another
what is a solution
this is what the periods show in the periodic table.
what is the number of electron shells.
Is CH4+O2 --> CO2+H2O balanced or unbalanced?
What is unbalanced?