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WorksheetsAtom Unit Warm UP
Total questions: 14
Worksheet time: 5mins
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?
The nucleus is negatively charged
The atom is a dense solid and is indivisible
The mass is conserved when atoms react chemically
The nucleus is center and positively charged.
Isotopes of an element have a different number of...
Protons/Identity
Neutrons/Atomic Mass
Electrons/Charge
Energy levels/configuration
What is the difference between Neon-20 and Neon-22?
They have different numbers of electrons.
They have different numbers of neutrons.
Only 1 is radioactive.
No difference.
How many protons are in this isotope?
9
21
12
What is a positive ion called?
anion
cation
isotope
covalent
If an atom loses electrons, the charge will be positive.
true
false
Which wave in the diagram has the greatest wavelength/lowest frequency?
Which of the following has wavelengths longer than visable light?
Gamma Rays
What does the Greek Letter λ symbolize?
wavelength
frequency
speed of light
planck's constant
Which electron transition has the largest emission of energy?
The left side, it has the greatest fall to ground state
The right side, it has the smallest fall to ground state.
They have equal energy
Neither emit energy
1s2 2s2 2p6 3s2
An element has 25 protons and 22 electrons. It has a charge of...
3+
3-
2+
1-
47+
