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- 1. Multiple Choice
Which of the following statements about subatomic particles is true?
Protons, electrons and neutrons all have charges.
The atomic number represents the total number of protons and neutrons in an atom.
Protons and neutrons are virtually identical except that they have opposite charges.
Electrons are the smallest and lightest subatomic particle that we have studied.
- 2. Multiple Choice
What does the nucleus of an atom contain?Electrons and neutronsProtons and neutronsNeutrinos and positronsDNA and RN - 3. Multiple ChoiceIn terms of matter, the atom is almost entirely filled with _____orbiting electronscharged protonsheavy neutronsempty space
- 4. Multiple ChoiceMost of the mass in an atom is made up of _____________________?protons and electronsprotons and neutronsneutrons and electronselectrons and quarks
- 5. Multiple Choice
The Model of the ATOM has:
Changed many times
Never changed
Changed once
Changed twice
- 6. Multiple Choice
Consider the following Rutherford-Bohr diagram:
It represents a neutral atom.
It represents a positive ion.
It represents an a negative ion.
It represents a neutral isotope.
- 7. Multiple Choice
The chemical symbol for this element is:
Cl
K
Ar
Ca
- 8. Multiple Choice
The atomic number for beryllium is:
4
5
9
9.01218
- 9. Multiple Choice
The mass number of argon is probably:
18
22
39.948
40
- 10. Multiple Choice
The atomic mass of carbon is:
20
12
12.01
40.08
- 11. Multiple Choice
The Periodic Table is organized by increasing...
atomic number
mass number
reactivity
atomic mass
- 12. Multiple Choice
Which of the following statements about groups is false?
Group 1 elements react vigorously with water to form basic solutions.
Group 16 elements have a tendency to form ions with 2- charges.
Elements in the same group have identical physical properties at room temperature.
Group 18 elements are very unreactive.
- 13. Multiple Choice
Which of the following statements about the Periodic Table is true?
Elements in the same group have similar chemical properties.
Iron is a main group element.
Elements in the same period have similar chemical properties.
The “magic” staircase divides transition elements from inner-transition elements.
- 14. Multiple Choice
Which of the following compounds does not contain a metallic element?
sodium bicarbonate
carbon dioxide
calcium chloride
manganese dioxide
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