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- 1. Multiple Choice
The diagram below is the Bohr model of an atom.
Which best describes this atom?
It has 6 electrons.
It has a positive charge.
It has 6 valence electrons.
It has a full outermost energy level.
- 2. Multiple Choice
The tiny, negatively charged particles are
nucleus
protons
electrons
neutrons
- 3. Multiple Choice
The attraction of a rubbed comb for paper gives evidence that
matter is electrical in nature
matter is magnetic
matter contains electrons
matter is electrically neutral
- 4. Multiple Choice
When two similarly charged objects are brought closer together, they
attract each other
stick to each other
have no effect on each other
repel each other
- 5. Multiple Choice
The central portion of an atom is called the
nucleus
shell
electron
ring
- 6. Multiple Choice
In a neutral atom, the number of electrons is
equal to the number of neutrons
greater than the number of protons
less than the number of protons
equal to the number of protons
- 7. Multiple Choice
Atoms of the same element that differ slightly in mass are called
neutrons
ions
isotopes
positrons
- 8. Multiple Choice
The differences in the mass of atoms of the same element are attributed to different numbers of
protons
neutrons
electrons
positrons
- 9. Multiple Choice
Of the following, the particle generally not found in the nucleus of an atom is
a hyperon
a meson
an electron
a muon
- 10. Multiple Choice
An atomic particle with a mass approximately 1/1837 of a proton is
a hyperon
a neutron
a muon
an electron
- 11. Multiple Choice
The atomic number of an element indicates
the number of protons
the number of electrons
the number of protons and neutrons
the number of neutrons
- 12. Multiple Choice
The scientist who arranged the elements in the Periodic Table according to their atomic number is
Moseley
Mendeleev
Rutherford
Bohr
- 13. Multiple Choice
The atomic mass of an atom is equal to the mass of the
protons
protons and neutrons
neutrons
electrons
- 14. Multiple Choice
The maximum number of electrons found in the inner most shell of any atom is
1
2
8
18
- 15. Multiple Choice
Of the following, the element that has an outermost shell that is complete is
sodium
neon
chloride
oxygen
- 16. Multiple Choice
Which of these elements is the most chemically reactive?
beryllium (Be)
calcium (Ca)
strontium (Sr)
radium (Ra)
- 17. Multiple Choice
How many valence electrons are in a neutral atom of nitrogen (N)?
2
3
5
15
- 18. Multiple Choice
How many valence electrons are in a neutral atom of Gallium (Ga)?
2
3
5
15
- 19. Multiple Choice
The alkali metal family of elements includes Li, Na, K, and Rb. These elements tend to easily form compounds with the halogens F, Cl, Br, and I. Which explains why they form compounds so easily?
They have the same electron configuration as the halogens.
They have one electron in their outer orbital which they readily lose.
They have seven electrons in their outer orbital which they readily lose.
They have one electron in their outer orbital which attracts the protons in the halogen atoms.
- 20. Multiple Choice
Which of these gaseous elements is least reactive?
hydrogen
helium
nitrogen
oxygen
- 21. Multiple Choice
The alkaline earth metal elements are in the same family in the periodic table because they all have
one valence electron.
two valence electrons.
seven valence electrons.
eight valence electrons.
- 22. Multiple Choice
The elements fluorine (F), chlorine (Cl), and iodine (I) are all in the same column on the periodic table. Which is the best explanation for this arrangement?
They are all gases at room temperature.
They were all discovered in ancient times.
They have the same number of energy levels.
They have the same number of valence electrons.
- 23. Multiple Choice
Which of the following is a property shared by the elements in the carbon family?
an atomic number of 6
an atomic mass of 12
the same electron configuration
the number of valence electrons
- 24. Multiple Choice
The position of an element on the periodic table helps scientists predict the number of electrons an atom will gain or lose during ion formation. According to the periodic table of the elements, which element is most likely to gain two electrons when it forms an ion?
calcium (Ca)
mercury (Hg)
oxygen (O)
iodine (I)
- 25. Multiple Choice
Based on the periodic table of the elements, which of these elements has properties most similar to calcium (Ca)?
carbon (C)
barium (Ba)
sodium (Na)
manganese (Mn)
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