atomic structure
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Atomic structure
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Atomic Structure Review
Multiple-choice exercise
Choose the correct answer for each question.Show all questions
<= 1 / 18=>
1. Most of the mass of the atom can be found in the:
A. ? electron cloud
B. ? nucleus
C. ? charges
D. ? electrons
2.
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1. The laws of electrostatics consistently demonstrate that opposite charges:
A. ? attract
B. ? repel
C. ? destroy one another
2. The charge and mass number of an electron are:
A. ? charge = +1, Mass number = 1
B. ? charge = -1, Mass number = 0
C. ? charge = +1, Mass number = 0
D. ? charge = 0, Mass number = 1
3. Of the basic atomic particles, the one that would be attracted to a negatively charged metallic plate is the:
A. ? neutron
B. ? electron
C. ? proton
4. The charge and mass number of a proton are:
A. ? charge = +1, Mass number = 0
B. ? charge = +1, Mass number = 1
C. ? charge = -1, Mass number = 0
D. ? charge = 0, Mass number = 1
5. The atomic number of an element is equal to:
A. ? the number of protons plus the number of neutrons
B. ? the number of neutrons in the atom
C. ? the number of protons in the atom
D. ? the number of protons plus the number of electrons
6. The atomic number of an element is equal to:
A. ? the number of protons plus the number of neutrons
B. ? the number of neutrons in the atom
C. ? the number of protons in the atom
D. ? the number of protons plus the number of electrons
7. The nucleus of the atom is held together by:
A. ? magnetism
B. ? nuclear forces
C. ? electrostatic attraction
D. ? electrons
8. The laws of electrostatics consistently demonstrate that "like" (identical) charges:
A. ? destroy one another
B. ? repel
C. ? attract
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Atomic Structure Review
Multiple-choice exercise
Choose the correct answer for each question.Show all questions
<= 10 / 18=>
1. The region labeled "X" in the diagram has a charge that is:
A. ? positive
B. ? neutral
C. ? negative
2.
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Atomic Structure Review
Multiple-choice exercise
Choose the correct answer for each question.Show all questions
<= 11 / 18=>
1. The letter "Y" in the diagram above marks the:
a.
Location of the neutrons
Electron cloud
Region of greatest density
Location of the protons
Nucleus
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Close Window 1. Isotopes (such as hydrogen-1, hydrogen-2, and hydrogen-3) are atoms of the
same element that differ in:
a.
the number of neutrons in the nucleus
the mass number
the atomic number
the number of electrons
the number of protons in the nucleus
The mass number of an atom is determined by:
A. ? adding the neutrons and electrons
B. ? the number of protons only
C. ? adding the neutrons and protons
D. ? adding the protons and electrons
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Atomic Structure Review
Multiple-choice exercise
Choose the correct answer for each question.Show all questions
<= 14 / 18=>
1.
The region labeled "Y" in the diagram has a charge that is:
A. ? positive
B. ? neutral
C. ? negative
Close Window 1. Which of the following descriptions apply to the nucleus?
a.
Dense
Positively charged
Mostly empty space
Small
The nucleus of most atoms is made up of:
A. ? protons and neutrons
B. ? protons and electrons
C. ? neutrons and electrons
D. ? electrons and protons
2. The _______________ constitute(s) most of the volume of an atom.
A. ? protons
B. ? electron cloud
C. ? nucleus
D. ? neutrons
3. The _______________ constitute(s) most of the volume of an atom.
A. ? protons
B. ? electron cloud
C. ? nucleus
D. ? neutrons
Atomic Structure Questions
Which is the smallest sub-atomic particle?
a. Proton
b. Neutron
c. Electron 2. Which sub-atomic particle has a neutral charge?
a. Proton
b. Neutron
c. Electron 3. What does the atomic number measure?
a. Protons
b. Neutrons
c. Sum of Neutrons and Protons 4. Avogadro's Number is:
a. 12
b. 6.02 x 1023
c. 60000000
d. 3.141579
e. 6.92 x 1024 5. Two isotopes of Si-27 and Si-31, both would be expected to have the same:
a. half-life
b. nuclear charge
c. atomic mass
d. number of neutrons
e. decay particles
Corrosion and rusting
What is the difference between corrosion and rust?
1.The following factors plays a vital role in corrosion process
A,temperature.
b.solute concentrationc.bothd.none
2.To slow the corrosion of iron you could
a. Connect it to a piece of leadb. Wrap tin around it
c. Connect iron to a negative terminal of a power sourced. Connect iron to a postive terminal of a power source
3.why ships that have sunk in deep areas of the oceans hardly rust at all?
4.sacrifical protection is used to stop railways lines rusting.
a
<=backREPEAT QUIZMy GCSE Science-CHEMISTRY Revision Q Index + ALL LINKS
A GCSE/IGCSE random multiple choice science-CHEMISTRY
QUIZ Questions on THE EXTRACTION OF METALS
(higher/harder level HT)
* Click [?] A-D choice. * Metal Extraction Revision Notes * AQA * CCEA * Edexcel * OCR 21stC * OCR Gateway * WJEC * EMAIL comment?query - quote Q ref [me-xx] * Updated Doc Brown Chemistry updated June 19th
2009 *
Show all 10 random questions previous Q 6 / 10next Q
1.
Copper is purified by the electrolysis of copper(II) sulphate solution using copper electrodes. All the chemical changes occur on the surface of the electrodes. The formula for copper(II) sulphate is CuSO4. Which word describes the process happening on the surface of the positive electrode? [me-47]
Copper is purified by the electrolysis of copper(II) sulphate solution using copper electrodes. All the chemical changes occur on the surface of the electrodes. The formula for copper(II) sulphate is CuSO4. Which word describes the process happening on the surface of the negative electrode? [me-48]
B.[A.] Which metals is purified by electrolysis? [me-69]
C.[A.] ? iron
D.[B.] ? copper
E.[C.] ? aluminium
F.[D.] ? gold
2.[7.]
<=backREPEAT QUIZMy GCSE Science-CHEMISTRY Revision Q Index + ALL LINKS
<=backREPEAT QUIZMy GCSE Science-CHEMISTRY Revision Q Index + ALL LINKS
A GCSE/IGCSE random multiple choice science-CHEMISTRY
QUIZ Questions on THE EXTRACTION OF METALS (foundation/easier level FT)
* Click [?] A-D choice. * Metal Extraction Revision Notes * AQA * CCEA * Edexcel * OCR 21stC * OCR Gateway * WJEC * EMAIL comment?query - quote Q ref [me-xx] * Updated Doc Brown Chemistry updated June 19th
2009 *
Show all 10 random questions previous Q 7 / 10next Q
1.
Which metal is found as the free element in the Earth's crust? [me-79]
A. ? gold
B. ? magnesium
C. ? sodium
D. ? chromium
2.[8.]
A.
<=backREPEAT QUIZMy GCSE Science-CHEMISTRY Revision Q Index + ALL LINKS