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Fall 2020 -review

QuestionAnswer
Define the term atomic mass, number at the bottom of the box in a periodic table, the number of protons PLUS the number of neutrons
Define the term atomic number. number in the top of the box on the periodic table, number of protons and electrons
What part of the Periodic Table is called a period? rows across
What part of the Periodic Table is called a group? columns up and down
Give examples and explain a chemical compound. atoms that are bonded together - H20, C02, C6H12O6
What happens during nuclear fission? the nucleus of an atom is split to make 2 smaller atoms
What happens during nuclear fusion? two small atoms are put together to make a larger atom
What are valence electrons? electrons in an atom's outermost shell
What is an energy level and how is it shown on the periodic table? energy levels are the same as periods. Energy levels are rows across the periodic table
How many electrons are needed to fill the first row on the periodic table? How can you tell this? 2 - there are only 2 elements in the first row
How many electrons are needed to fill 2nd and 3rd rows on the periodic table? How can you tell this? 8 - there are 8 elements in these rows
Use the Periodic Table to determine the number of electrons in the outer shell of an atom. count over from left to right until you reach the atom - remember NOT to count the transition elements
Describe what happens when an electron falls to a lower energy level? energy is released
Describe what is needed to move an electron to a higher energy level? energy must be added
Define the term Isotope. isotopes are atoms of the same element that have different numbers of electrons
What is an ion and how does an atom become an ion? ions are atoms with a positive OR negative charge to become an ion, atoms lose or gain electrons
An anion has what type of charge and how did it get that charge? negative charge - the atom GAINED electrons
A cation has what type of charge and how did it get that charge? positive charge - the atom LOST electrons
Describe what happens when an atom gains electrons? it gets a negative charge and becomes an ANION
Describe what happens when an atom loses electrons? it gets a positive charge and becomes a CATION
How can you determine if an element is a metal? it is on the left side of the periodic table
How can you determine if an element is a nonmetal? it is on the right side of the periodic table
Explain what happens when a covalent bond forms and how to name the products of a covalent bond. electrons are SHARED - first element stays the same, second element: ending is changed to IDE: prefixes are added
Explain what happens when an ionic bond forms and how to name the products of an ionic bond. electrons are TAKEN or GIVEN - first element stays the same, second element: ending is changed to IDE:
Explain how to determine the products of a chemical reaction. products are on the RIGHT side of the reaction
Explain how to determine the reactants of a chemical reaction. reactants are on the LEFT side of the reaction
What is a coefficient in a chemical equation and what does it tell you? the large number before an element or compound 6N. 3HNO it tells how many atoms or compounds are present
What is a subscript in a chemical equation and what does it tell you? the small number after an atom - the number of atoms of that element
Give an example of an equation and identify the elements and number of atoms on each side of the arrow.
Identify and give examples of a synthesis reaction. A + B --> AB
Identify and give examples of a decomposition reaction. AB --> A + B
Identify and give examples of a single replacement reaction. AB + C --> AC + B
Identify and give examples of a double displacement reaction. AB + CD --> AD + CB
Created by: lb goodlock
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