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WorksheetsAtomic Theory, Grade 10
Total questions: 27
Worksheet time: 26mins
This particle is found in the nucleus and has no charge
Neutron
Proton
Electron
Orbital
This is a negatively charged particle found outside the nucleus
Electron
Proton
Neutron
Orbital
Rutherford's gold foil experiment provided evidence that...
Negative and positive charges are spread evenly throughout the atom.
Alpha particles have a positive charge.
Gold is not a dense as previously thought.
There is a dense positively charged nucleus at the center of an atom.
What are atoms with the same number of protons but different numbers of neutrons?
electrons
protons
neutrons
isotopes
an element will always have the same number of
neutrons
protons
isotopes
atoms
Which particle does not contribute mass to the atom?
Proton
Neutron
Electron
Nucleus
An atom has 10 protons and a mass of 18. It has __ neutrons
10
18
28
8
The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.
12.5
13
25
37
How many neutrons does uranium-239 have
92
147
239
331
How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
34
36
2
40
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant.
204
206
207
208
What is the mass number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons and electrons in the atom
The color of emitted light with the LONGEST wavelength is
violet
green
red
indigo
The color of emitted light with the HIGHEST frequency is
violet
green
red
indigo
The frequency of UV radiation is is 1.5 x 1014 Hz. What is its wavelength?
2.0 x 106 m
2.0 x 10-6 m
4.5 x 106 m
2.25x1023 Hz
Violet light has a wavelength of
4.0 x 10-9 m. What is the frequency?
1.2 x 10-3 Hz
7.5 x 1016 Hz
1.2 x 1012 Hz
7.5 x 10-16 Hz
