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Ch 1 Review

Chapter 1 Matter Energy Review

A proton has a _____________ charge. positive
A proton is located in the atom’s ________________. nucleus
A neutron has a ___________________charge. neutral
A neutron is located in the atom’s __________________. nucleus
An electron has a __________________ charge. negative
An electron is found in an atom’s ___________________. orbitals
An atom is __________ because it has the same number of protons and electrons. neutral
__________________ ______________ are the electrons involved in bonding between atoms. Valence electrons
The modern periodic table is arranged in order of increasing _________ ______________. atomic number
An element’s location in the periodic table can be used to predict its __________. properties
Elements in a column of the periodic table are in the same __________. group
Elements in a group have the same number of ____________ __________. valence electrons
Across a period of elements, the number of valence electrons ___________ from left to right. increases
Elements in Group 1 have ___________ valence electron. one
A _____________ change will change matter into one or more new substances. chemical
The only sure evidence of a chemical reaction is the production of a __________ substance. new
In a chemical reaction, __________ is either absorbed or released. energy
________________ chemical reactions absorb energy in the form of heat. Endothermic
________________ chemical reactions release energy in the form of heat. Exothermic
Table salt, baking soda, and water are all examples of ________________. compounds
A ________ ____________ is a shorter, easier way to show chemical reactions, using symbols instead of words. chemical equation
_________________ are the substances on the left side of a chemical equation. Reactants
In a chemical formula, __________________ show the ratio of atoms of different elements in a compound. subscripts
The principle of ____________ of ______________ states that matter is not created or destroyed. conservation of mass
In a ___________________ chemical reaction two or more substances combine to make a more complex substance. synthesis
In a ______________ chemical reaction, the reactant is broken down into simpler products. decomposition
In a _______________ chemical reaction, one element replaces another in a compound. replacement
The ____________ __________ is the minimum amount of energy that has to be added to start a reaction. activitation energy
An ____________________ is a material used to decrease the rate of reaction. inhibitor
A _____________________ is a material used to increase the rate of a chemical reaction. catalyst
Created by: lschramme



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