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WorksheetsScience STAAR Review
Total questions: 120
Worksheet time: 6hrs 34mins
Which part of the atom determines its identity?
Protons
Neutrons
Electrons
Valence Electrons
How many atoms of carbon are present in one molecule of C2H6O2
0
2
6
10
How many total atoms are present in C2H3O2
2
3
7
10
How many atoms of Phosphorus are present in one molecule of Ba3(PO4)2
3
4
6
2
Which diagram best represents a first quarter moon?
Based on the diagram, where is the sun located
On the left of the diagram
On the right of the diagram
Above the diagram
Below the diagram
Based on the diagram above, what phase is observed from Earth at location D?
waxing crescent
first quarter
waning crescent
new moon
How would the moon appear from point B?
Based on the image, what lunar phase will be visible from Earth next?
waxing gibbous
first quarter
full moon
new moon
Based on the sequence shown, which word best describes the changes in the moon's appearance during this portion of the lunar cycle?
waxing
waning
crescent
gibbous
Based on the sequence shown, which word best descrives the changes in the Moon's appearance?
waxing
waning
gibbous
equinox
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
where are the metaloids found
far left, vertical
stair step/diagonal
far right horizontal
at the bottom
Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.
numbers, rows
masses, rows
masses, column
numbers, column
A row on the Periodic Table of Elements
family
period
row
isotope
