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Science
6th -
8thgrade
Atoms, the periodic table, chemical reactions, and classification of matter
30 questions
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- 1. Multiple ChoiceParticle of the nucleus that does not have a chargeprotonelectronneutron
- 2. Multiple ChoiceParticle of the nucleus that has a positive chargeprotonneutronelectron
- 3. Multiple Choice
The chemical formula for methane gas is CH4. How many atoms of carbon are in one molecule of methane?
1
4
5
8
- 4. Multiple ChoiceThis indicates the number of protons in the nucleus of an atomatomic massatomic numbervalence
- 5. Multiple ChoiceThis indicates the sum of the protons and neutrons in the nucleus of an atomatomic numberatomic massvalence
- 6. Multiple ChoiceThe path that electrons follow around the nucleus of an atomionvalence electronsorbit or "shell"
- 7. Multiple ChoiceHow many protons does an atom of carbon contain?1260
- 8. Multiple Choice
How many neutrons does an atom of Beryllium have?
5
6
11
- 9. Multiple Choice
How are elements and compounds similar?
they are both pure substances
they are both broken down by physical changes
they are both made up of different kinds of atoms
they are both listed on the periodic table
- 10. Multiple ChoiceHow many neutrons does an aluminum atom have?141327
- 11. Multiple ChoiceHow many valence electrons in the Bohr model of Magnesium?820
- 12. Multiple Choice
How does this equation demonstrate the law of conservation of matter?
The equation has the same number of each type of atom on both sides of the equation.
The equation does not show the law of conservation of matter.
There are more H atoms in the products than in the reactants.
There are more Cl atoms in the reactants than in the products.
- 13. Multiple Choice
Mint chocolate chip ice cream is an example of what?
heterogeneous mixture
homogeneous mixture
element
compound
- 14. Multiple Choice
Which of the following elements is most like magnesium (Mg)?
Ca
Cu
H
Na
- 15. Multiple Choice
Looking at the section of the periodic table shown, which two elements are in the same group?
B and Ga
B and C
Ga and Ge
B and O
- 16. Multiple Choice
Which of the following is NOT made up of atoms?
subatomic particles
elements
molecules
pure substances
- 17. Multiple Choice
Which of the following is a compound?
Water
Silicon
Sodium
Chlorine
- 18. Multiple Choice
Where are the metalloids located on a periodic table?
Along the zig-zag line
Under the main part of the periodic table
In group 1
In group 8
- 19. Multiple Choice
Luster, malleability, ductility, and conductivity are all properties of
Metals
Nonmetals
Metalloids
Metals, nonmetals, and metalloids
- 20. Multiple Choice
The image shows
A compound
An element
A mixture of compounds
A mixture of elements
- 21. Multiple Choice
The image shows
A mixture of elements and a compound
A mixture of compounds
A mixture of elements
An element
- 22. Multiple Choice
In the chemical reaction pictured, which substance is a reactant?
Hydrogen
Hydrogen chloride
Oxygen
Carbon
- 23. Multiple Choice
In the chemical reaction pictured, which substance is a product?
Hydrogen chloride
Hydrogen
Chlorine
Oxygen
- 24. Multiple Choice
How many atoms of carbon in 2CO2
2
4
1
8
- 25. Multiple Choice
How many total atoms in the following chemical formula: C2H6
8
2
6
1
- 26. Multiple Choice
The atomic mass is the total number of protons + neutrons in an atom. Why does the atomic mass NOT include electrons?
Electrons are so small that they have no mass
Electrons are more massive than protons and neutrons
Electrons don't really exist
Electrons orbit around the nucleus so quickly that their mass cannot be calculated
- 27. Multiple Choice
Which statement correctly describes the location of each subatomic particle within an atom?
Protons and neutrons are inside the nucleus, and electrons orbit around the nucleus in an electron cloud
Protons and electrons are inside the nucleus, and electrons orbit around the nucleus in an electron cloud
Electrons and neutrons are inside the nucleus, and electrons orbit around the nucleus in an electron cloud
Protons and neutrons are inside the nucleus, and some neutrons also orbit around the nucleus
- 28. Multiple Choice
How many H atoms in 5 H3(PO4)2
15
5
12
3
- 29. Multiple Choice
Which chemical equation is balanced?
Equation 1
Equation 2
Equation 3
Equation 4
- 30. Multiple Choice
Which equation does NOT demonstrate the law of conservation of matter?
Equation A
Equation B
Equation C
All the equations demonstrate the law of conservation of matter
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