8th-grade Atomic Structure And The Periodic Table
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You’re never too young or too old to start learning about science, and today we’ll be doing so at an eighth-grade level. How much do you know about atomic structure and the periodic table of elements? Take the following quiz and find out for sure!
- 1.The central part of an atom is called the
- A.
Electron
- B.
Neutron
- C.
Proton
- D.
Nucleus
- 2.The electric charge on a proton is
- A.
Positive
- B.
Neutral
- C.
Negative
- D.
Changing
- 3.The number of protons in the nucleus is the
- A.
Atomic mass
- B.
Isotope
- C.
Atomic number
- D.
Half-life
- 4.Nitrogen has the atomic number 7. An isotope of nitrogen containing seven neutrons would be
- A.
Nitrogen-13
- B.
Nitrogen-14
- C.
Nitrogen-15
- D.
Nitrogen-16
- 5.How do the size of a negative ion compare to the size of the atom that formed it?
- A.
It's smaller
- B.
It's larger
- C.
It's the same size
- D.
It varies
- 6.The modern periodic table is organized by
- A.
Size of atom
- B.
Atomic mass
- C.
Number of neutrons
- D.
Atomic number
- 7.Elements in a group have
- A.
A wide range of chemical properties
- B.
The same atomic radius
- C.
Similar chemical properties
- D.
The same number of protons
- 8.Elements in a period have
- A.
A wide range of chemical properties
- B.
The same atomic radius
- C.
Similar chemical properties
- D.
The same number of protons
- 9.From left to right in a period, the size of the atom
- A.
Increases
- B.
Decreases
- C.
Remains the same
- D.
Shows no pattern
- 10.
The elements in Group 1 of the periodic table are commonly called the- A.
Alkali metals
- B.
Transition metals
- C.
Alkaline earth metals
- D.
Rare earth metals
- 11.The isotope nitrogen-13 has a half-life of 10 minutes. If you start with 40 grams of this isotope, how many grams will you have left after twenty minutes?
- A.
10
- B.
15
- C.
20
- D.
30
- 12.
What does the number above the symbol for each element represent?
- A.
The number of isotopes
- B.
Its atomic number
- C.
Its number of neutrons
- D.
Its atomic mass
- 13.
The atom of what element is in Period 4, Group 13?
- A.
Na
- B.
Ga
- C.
Al
- D.
K
- 14.
What do the elements on the far right of the table (He, Ne, Ar, and Kr) have in common?
- A.
They do not generally react with other elements
- B.
They are liquid in normal conditions
- C.
They are metals that rust easily
- D.
They are very reactive gases
- 15.
How many electrons does a neutral chlorine (Cl) atom contain
- A.
16
- B.
17
- C.
18
- D.
19
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