
Atomic Structure Review
Authored by Pearl Jimenez
Science
6th - 9th Grade
NGSS covered

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10 questions
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1.
MATCH QUESTION
15 mins • 3 pts
Match the Following
Positively charged particles found in the nucleus of an atom.
Nucleus
The dense center of an atom containing protons and neutrons.
Element
A substance that cannot be broken down into simpler substances by chemical means.
Atom
The smallest unit of an element that keeps the element’s chemical properties.
Proton
Particles with a neutral charge found in the nucleus of an atom.
Neutron
Tags
NGSS.MS-PS1-1
2.
MATCH QUESTION
15 mins • 3 pts
The electrons filling the outermost shell; react with other atoms.
Molecule
A substance formed from two or more atoms chemically united in fixed proportions.
Valence Electron
A negatively charged subatomic particle located around the nucleus of an atom.
Electron
Areas around the nucleus filled with electrons.
Electron Shell
A group of atoms held together by chemical forces.
Compound
Tags
NGSS.MS-PS1-1
3.
MATCH QUESTION
15 mins • 3 pts
Horizontal rows of elements that have the same number of electron shells.
Family/Group
Vertical columns of elements that have the same amount of valence electrons.
Periodic Table
The average number of protons and neutrons in one atom of an element.
Period
Elements that are malleable, ductile, and good conductors; typically shiny.
Atomic Mass/Mass Number
All known elements arranged in order by atomic number.
Metal
4.
MATCH QUESTION
15 mins • 3 pts
An element that has properties that fall between metals and nonmetals.
Nonmetal
Elements in group 18 that have very low reactivity.
Noble Gas
Elements that are brittle, poor conductors, and have low melting and boiling points.
Metalloid
5.
REORDER QUESTION
15 mins • 5 pts
Using a periodic table (you can use the one in the textbook) order the following elements by mass number, least to greatest.
Thallium
Boron
Hydrogen
Gallium
Radon
6.
REORDER QUESTION
15 mins • 5 pts
Using a periodic table (you can use the one in the textbook) order the following elements by # of Electron Shells, least to greatest.
Strontium
Barium
Sodium
Dubnium
Calcium
7.
REORDER QUESTION
15 mins • 5 pts
Using a periodic table (you can use the one in the textbook) order the following elements by # of valence electrons, least to greatest.
Neon
Potassium
Carbon
Barium
Oxygen
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