_________ are formed when two or more elements combine together.
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Science Practice Test
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Science
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9th Grade
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53 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Atoms have tiny nucleus surrounded by ________
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Word equations give the names of the reactants and products ONLY
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Elements are made of ONLY one type of atom
True
False
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Balance this equation: H₂ + Br₂ -> HBr
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The _______ states that no atoms are lost or made during a chemical reaction, so the mass of the products equals the mass of the reactants.
Law of conservation of mass
Law of Definite Proportions
Law of Constant Composition
Avogadro's Law
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A _____ is made up of two or more substances that are not chemically combined together.
Mixture
Compound
Sollution
Element
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