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Chapter 4 Test Review
Review cards for Chapter 4 Test
21
Science
9th Grade
11/25/2014

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Cards

Term
What part of the atom contains the protons and neutrons?
Definition
nucleus
Term
What are the regions of an atom where electrons are found?
Definition
orbitals
Term
Who proposed the first widely accepted version of the atomic theory?
Definition
Dalton
Term
Who proposed a model in which electrons can only be in certain energy levels?
Definition
Bohr
Term
What are the electrons in the outermost energy level called?
Definition
valence electrons
Term
The atomic number tells the number of ___ in an atom.
Definition
protons
Term
The number of protons equals the number of ___.
Definition
electrons
Term
The protons plus the neutrons is equal to the ___ number.
Definition
mass
Term
Atoms of the same element with different numbers of neutrons are called ___.
Definition
isotopes
Term
The weighted average of all the masses of all the naturally occurring isotopes of an element is the ___.
Definition
average atomic mass
Term
The majority of the atoms in the periodic table are ___.
Definition
metals
Term
___ have properties of both metals and nonmetals.
Definition
metalloids (semiconductors)
Term
If I have 1 mole of marshmallows, how many marshmallows do I have?
Definition
6.02 x 10^23
Term
Explain why oxygen atoms (or any atom is neutral). What 2 particles are equal?
Definition
protons = electrons
Term
Elements in the same horizontal row, or period, have the same number of valence electrons and similar chemical properties.
Definition
False
Term
What are the 3 subatomic particles
Definition
protons, neutrons, electrons
Term
What is the family name for Group 1
Definition
alkali metal
Term
What is the family name for Group 18
Definition
noble gas
Term
What is the family name for Group 2
Definition
alkaline earth metals
Term
What is the family name for Groups 3-12
Definition
transition metals
Term
What is the family name for Group 16
Definition
chalcogens
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