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Matter and Chemical Reactions
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When 2 atoms share their electrons with each other, they are known as
covalent bonds
When one atom gives up its’ electron to another atom in a chemical reaction, this is known as an
ionic bond
Atoms in compounds are chemically _________ together.
bonded
Unlike a molecule, a _______ contains 2 or more different kinds of atoms.
compound
__________ is heat that travels through space.
Radiation
_____________ is the direct transfer of heat from one substance to another substance that it is touching.
Conduction
____________is the transfer of heat by the movement of a fluid (gas/liquid)
Convection
A measurement of an object's thermal energy/heat is known as
temperature
________ reactions release energy to their surroundings. This makes the area around the reaction feel warm or hot.
Exothermic
Heat always goes from the ______ object to the ____ object.
warmer; colder
______________ reactions absorb energy from their surroundings. This makes the area around the reaction feel cold.
Endothermic
____ is the energy that is transferred between two objects that are at different initial temperatures.
Heat
True/False: Energy cannot be created nor destroyed, it only transforms from one type to another.
True
______________ ____________ is the energy of motion.
Kinetic energy
When energy is stored in chemical substances, it is ______ __________
potential energy
In science, the ability to do work is known as
energy
To make sure that all of the mass and the matter is conserved, chemical equations need to be
balanced
Part of the atom with negative charge
Electron
Part of the atom with positive charge
Proton
The part of the atom with no charge
Neutron
________________ are groups of atoms that are chemically bonded together.
Molecules
_______ are the final result from the reactants mixing.
Products
__________ are the chemicals being mixed together.
Reactants
Matter cannot be created nor destroyed, only transformed. This is the Law of
Conservation of Mass/Matter
The most basic unit of matter is the
atom
Burning a log, baking a cake, mixing together vinegar and baking soda are all examples of what kind of change?
Chemical Change
A _________ _________ is when a substance is chemically changed into something else
Chemical Reaction
Cutting paper, crushing a can, melting ice or freezing water are examples of what kind of change?
Physical change
A ___________ change is where the item has undergone a chemical reaction and become a new substance.
chemical
A ______ change in matter does not alter the chemicals in the subject.
physical
______________ is the study of matter, its’ properties and how it changes.
Chemistry
___________ is anything that takes up space and has mass.
Matter
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