1) Chloride ion has number of protons a. 17 b. 18 c. 24 d. 34
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2) Smaller particles in an atom are called a. atomic particles b. subatomic particles c. smaller particles d. neutral particles
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3) Chemical symbol represents a. chemical formula b. molecular formula c. structural formula d. atomic formula
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4) The number of protons in a 'carbon' atom is a. 6 b. 11 c. 12 d. 10
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5) A modern model of an atom shows that electrons are present outside nucleus in the region of high a. probability b. velocity c. speed d. energy level
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6) "O3" is a chemical formula of a. oxygen b. oxides c. ozone d. acid rain
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7) Ammonia molecule contains one nitrogen atom and three atoms of a. hydrogen b. helium c. nitrogen d. carbon
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8) As compare to hydrogen atom, helium atom is a. very small b. very massive c. medium in mass fraction d. same in volume
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9) The major part of an atom is a. empty b. filled c. charged d. covered
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10) Rutherford's Model explains that atom has a nucleus which is surrounded by a. protons b. electrons c. neutrons d. nuclear energy
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