Question
Number. 51. Protons have.
Option A.
no charge.
Option B.
positive charge.
Option C.
negative charge.
Correct
Answer is. positive charge.
Explanation.
Protons are positively charged.
Question
Number. 52. Producing a compound from commonly available materials
is.
Option A.
synthesis.
Option B.
analysis.
Option C.
bombardment.
Correct
Answer is. synthesis.
Explanation.
Making a compound is called synthesis, breaking it apart is called
analysis.
Question
Number. 53. A different number of nucleons in the nucleus of atoms
would represent.
Option A.
semiconductor.
Option B.
isotopes.
Option C.
isotones.
Correct
Answer is. isotopes.
Explanation.
An Isotope is an element with a 'wrong' number of neutrons.
Question
Number. 54. Molecules of matter are in constant motion. The amount of
vibration or motion is dependent on.
Option A.
temperature.
Option B.
volume.
Option C.
pressure.
Correct
Answer is. temperature.
Explanation.
Temperature produces molecular motion.
Question
Number. 55. When a chemical change takes place, the smallest particle
indivisible in an element is called.
Option A.
an atom.
Option B.
an electron.
Option C.
a neutron.
Correct
Answer is. an atom.
Explanation.
An atom is the smallest particle in an element. Particles smaller
than that (neutrons, protons, electrons) do not define an element.
Question
Number. 56. A nucleus of an atom consists of.
Option A.
positively charged particles.
Option B.
a nucleus and normally has no overall charge at all and so is
neutral.
Option C.
negatively charged particles.
Correct
Answer is. positively charged particles.
Explanation.
Protons are positive, neutrons are neutral.
Question
Number. 57. A compound is a.
Option A.
mixture of more than one element which are chemically bonded
together.
Option B.
solution (either liquid or solid) of elements or mixtures of elements
to form a new material.
Option C.
mixture of more than one element which are mixed together.
Correct
Answer is. mixture of more than one element which are chemically
bonded together.
Explanation.
A compound is two or more elements chemically bonded.
Question
Number. 58. A compound such as water can exist in how many states?.
Option A.
2.
Option B.
3.
Option C.
1.
Correct
Answer is. 3.
Explanation.
Solid, liquid, gas.
Question
Number. 59. Select the correct statement from the following.
Option A.
Temperature is the only factor which can affect the state in which
matter exists.
Option B.
Matter can only exist in one of three states.
Option C.
As temperature rises a solid will always become a liquid and then a
gas.
Correct
Answer is. Matter can only exist in one of three states.
Explanation.
Solid, liquid, gas. Pressure also affects the state in which matter
exists.
Question
Number. 60. Isotopes of an element have.
Option A.
a different atomic number.
Option B.
the same number of neutrons but a different number of protons.
Option C.
the same number of protons but a different number of neutrons.
Correct
Answer is. the same number of protons but a different number of
neutrons.
Explanation.
NIL.
Question
Number. 61. Neutrons have.
Option A.
no charge.
Option B.
a positive charge.
Option C.
a negative charge.
Correct
Answer is. no charge.
Explanation.
NIL.
Question
Number. 62. Atomic MASS number is the number of.
Option A.
protons.
Option B.
protons and neutrons.
Option C.
electrons.
Correct
Answer is. protons and neutrons.
Explanation.
Mass number is the total number of items in the nucleus (protons and
neutrons).
Question
Number. 63. How many electrons does an `S` orbital hold?.
Option A.
6.
Option B.
8.
Option C.
2.
Correct
Answer is. 2.
Explanation.
How many electrons does an `S` orbital hold?.
Question
Number. 64. The number of electrons in a stable atom equals.
Option A.
the number of neutrons in the nucleus.
Option B.
the number of protons and neutrons in the nucleus.
Option C.
the number of protons in the nucleus.
Correct
Answer is. the number of protons in the nucleus.
Explanation.
Electrons = Protons (to cancel the electrical charge).
Question
Number. 65. An isotope of an element has.
Option A.
the same atomic number but a different mass number.
Option B.
the same mass number but a different atomic number.
Option C.
a different mass and atomic number.
Correct
Answer is. the same atomic number but a different mass number.
Explanation.
NIL. http://en.wikipedia.org/wiki/Isotope
Question
Number. 66. The mass number of an element is based on.
Option A.
the total number of protons and neutrons in its nucleus.
Option B.
the number of protons in its nucleus.
Option C.
the number of neutrons in its nucleus.
Correct
Answer is. the total number of protons and neutrons in its nucleus.
Explanation.
NIL. http://chemistry.about.com/library/glossary/bldef57040.htm
Question
Number. 67. The atomic weight of all atoms is related to.
Option A.
Hydrogen.
Option B.
Carbon.
Option C.
Helium.
Correct
Answer is. Carbon.
Explanation.
NIL.
http://education.yahoo.com/reference/dictionary/entry/atomic%20weight
Question
Number. 68. The chemical bonding of two or more elements is called.
Option A.
chemical analysis.
Option B.
chemical synthesis.
Option C.
chemical fusion.
Correct
Answer is. chemical synthesis.
Explanation.
NIL. http://en.wikipedia.org/wiki/Chemical_synthesis
Question
Number. 69. Two or more elements that are chemically bonded together
and have an even mass distribution form a.
Option A.
mixture.
Option B.
substance.
Option C.
chemical compound.
Correct
Answer is. chemical compound.
Explanation.
When elements bond chemically, they make a compound.
Question
Number. 70. An atom that gains one or more additional electrons is
called.
Option A.
a negative ion.
Option B.
a positive ion.
Option C.
an isotope.
Correct
Answer is. a negative ion.
Explanation.
Electrons are negatively charged, so additional electrons make an
atom into a negative ion.
Question
Number. 71. Ionic bonding involves.
Option A.
electron sharing.
Option B.
attraction to a free electron cloud.
Option C.
electron transfer.
Correct
Answer is. electron transfer.
Explanation.
Ionic bonding is formed when electrons are transferred.
Question
Number. 72. Non-metals form.
Option A.
covalent bonds.
Option B.
ionic bond.
Option C.
metallic bonds.
Correct
Answer is. covalent bonds.
Explanation.
Non-metals usually form covalent bonds.
Question
Number. 73. Brownian Movement describes.
Option A.
Brownian Movement describes.
Option B.
the attraction of electrons.
Option C.
the motion of molecules.
Correct
Answer is. the motion of molecules.
Explanation.
NIL. http://www.hyperdictionary.com/dictionary/Brownian+movement
Question
Number. 74. Elements on the extreme right of the periodic table are.
Option A.
Metals.
Option B.
Non-metals.
Option C.
Transition metals.
Correct
Answer is. Non-metals.
Explanation.
NIL. http://science.howstuffworks.com/atom8.htm
Question
Number. 75. Oxygen, atomic number 8 is.
Option A.
trivalent.
Option B.
univalent.
Option C.
bivalent.
Correct
Answer is. bivalent.
Explanation.
NIL.
http://www.sil.org/linguistics/GlossaryOfLinguisticTerms/WhatIsValency.htm
Question
Number. 76. The atomic number of the atom of an element is based on.
Option A.
the number of neutrons in to nucleus.
Option B.
the number of protons in its nucleus.
Option C.
the total number of protons and neutrons in its nucleus.
Correct
Answer is. the number of protons in its nucleus.
Explanation.
NIL. http://www.hyperdictionary.com/dictionary/atomic+number
Question
Number. 77. Water is.
Option A.
an element.
Option B.
a mixture.
Option C.
a compound.
Correct
Answer is. a compound.
Explanation.
NIL.
Question
Number. 78. The Mass of a Proton is approximately.
Option A.
equal to the mass of an electron.
Option B.
equal to the relative mass of a molecule.
Option C.
2000 times greater than the mass of an electron.
Correct
Answer is. 2000 times greater than the mass of an electron.
Explanation.
NIL.
Question
Number. 79. Noble gases are _______ and _______ and have a full outer
shell of electrons.
Option A.
fluorine and neon.
Option B.
sulphur and neon.
Option C.
helium, neon, argon.
Correct
Answer is. helium, neon, argon.
Explanation.
NIL. http://www.chemicalelements.com/groups/noblegases.html
Question
Number. 80. If a hydrogen atom has 2 neutrons and 1 proton what kind
of water would you get?.
Option A.
Fresh water.
Option B.
Heavy water.
Option C.
Salt water.
Correct
Answer is. Heavy water.
Explanation.
Heavy water - water containing a substantial proportion of deuterium
atoms, used in nuclear reactors.
Question
Number. 81. A majority of an atom's mass is in the.
Option A.
compound.
Option B.
isotope.
Option C.
nucleus.
Correct
Answer is. nucleus.
Explanation.
NIL. http://en.wikipedia.org/wiki/Atom
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