Molecules and Compounds

Molecules and Compounds

6th - 9th Grade

20 Qs

quiz-placeholder

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Molecules and Compounds

Molecules and Compounds

Assessment

Quiz

Other Sciences

6th - 9th Grade

Hard

Created by

BEREKET TESFAY

Used 84+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it impossible to see molecules with the naked eye?
they are too big
they are too small
they are too fast
they have no mass

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these compounds has the most atoms?
CO2
C6,H12,O6
O2
Na,Cl,He,O3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The separation of ions that occurs when an ionic compound dissolves in a solution is known as
association
dissociation
associative principle
molecular association

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At room temperature, oxygen is a gas and hydrogen is a gas.  When they combine, they form a 
solid
liquid
gas
solution

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A water molecule contains
one hydrogen atom and two oxygen atoms
two hydrogen atoms and one oxygen atom
two hydrogen atoms and two oxygen atoms
two hydrogen atoms and no oxygen atoms

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

___________ are completely different from the elements they are made of.
compounds
atoms
elements
ions

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Sodium can burn and chlorine can kill you. When they combine into a molecule, the new substance is
a solid that is safe to touch
an explosive solid that must be handled carefully
a combination of gasses that can be deadly
a neutral gas that is safe to breathe

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