Chemistry EOG Review

Quiz
•
Science
•
8th Grade
•
Medium
+1
Standards-aligned
Angel Hull
Used 64+ times
FREE Resource
26 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is a compound?
sodium
sugar
nitrogen
air
Answer explanation
Sodium and Nitrogen are both on the periodic table so they are elements. Air is a homogenous mixture of oxygen, nitrogen, carbon dioxide and water vapor. Sugar is a compound of carbon, hydrogen and oxygen sharing valence electrons.
Tags
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
several molecules of water are produced
the mass of the carbon atoms is reduced during this reaction
the mass of the atoms in the reactant equals the mass of the atoms in the products
the mass of the hydrogen atoms is the only thing that remains the same before and after the reaction
Answer explanation
The Law of Conservation of Mass states that the mass of the reactants will equal the mass of the products in a closed system.
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which is classified as an element?
carbon dioxide
iron
vinegar
water
Answer explanation
Iron is the only answer choice that is on the periodic table (Fe). The rest are compounds.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which best describes the sequences of the elements in Period 5 of the periodic table?
highly reactive gases, relative nonreactive metals, metalloids, very nonreactive gases, nonreactive nonmetals
highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmetals, nonreactive gases
nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases
nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases
Answer explanation
A period is a row on the periodic table. All rows start with highly reactive metals followed by less reactive metals and ends with highly reactive nonmetals and finally nonreactive gases.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which statement is true about a chemical reaction?
the physical states of the atoms in the reaction determine the products
some of the atoms in the reactants will be part of the products
the number of atoms in the reactants determines the products
all of the atoms in the reactants will be a part of the products
Answer explanation
According the the Law of Conservation of Mass - ALL of the atoms of the reactants will be part of the products. (Elements stay the same, just get rearranged).
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?
group 1
group 2
group 16
group 18
Answer explanation
Eight is great! Chlorine has 7 valence electrons. It just needs 1 more to be stable. The alkali metals in Group 1 all have 1 valence electron.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which is the best example of a chemical change?
butter melting
egg cooking
paper tearing
water evaporating
Answer explanation
All changes in state (evaporation, melting, freezing) are physical changes. Changes in odor such as when cooking an egg indicate chemical change.
Tags
NGSS.MS-PS1-2
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