Atoms & elements
what is the definition of an atom
the basic unit of a chemical element.
Explain the importance of a periodic table
to quickly refer to information about an element, like atomic mass and chemical symbol.
The definition of a chemical change
A chemical change happens when one chemical substance is transformed into one or more different substances
The definition of a physical change
usually reversible change in the physical properties of a substance, as size or shape
The importance of chemical measurements
what is the difference between an element and a compound?
An element is a pure substance made up only one type of atom, while a compound is made up of two or more different types of atoms chemically bonded together
what is the symbol for oxygen on the periodic table?
The symbol for oxygen on the table is O
A chemical change is also known as
what is chemical reaction
cooking an egg is a result of
physical change
the importance of being accurate in chemistry
what is crucial
How many protons, neutrons, and electrons are in a carbon atom?
A carbon atom has 6 protons, 6 neutrons, 6 electrons
Which element is located between magnesium (mg) and chlorine on the periodic table?
The element located between magnesium and chlorine on the periodic table is argon
when does the breaking of chemical bonds release energy?
what is they only release energy when there formed
different forms of water
what is liquid, vapor , solid
is there rounding when measuring chemistry
what is yes
What is the electron configuration of a sodium atom?
The electron configuration of a sodium atom is 1s^2, 2s^2, 2p^6, 3s^1
what is the origin of the periodic law, and how does it relate to the periodic table?
The periodic law is a fundamental principle of chemistry that states the physical and chemical properties of elements are periodic functions of their atomic numbers.
the formation of a solid when two liquids are combined
what is precipitation
crumbling a paper is a result of
what is physical change
another example of a chemical measurement that deals in kilos is
kilocalories
What is the ionic charge for hcl?
Since HCL is ionic charge is balanced then the total charge is 0
What is the difference between the periods and groups on the periodic table
The periods on the periodic table are the horizontal rows that represent the number of electron shells in an atoms structure, while the groups are the vertical columns that represent elements with similar properties
a result of chemical change
what is a change a change in the way atoms are bonded
all the forms of physical changes are
vapor, water , solid
abbreviation for luminous intensity
what is cd