4220905
Descripción
Test por alys.caldwell, actualizado hace más de 1 año
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Creado por alys.caldwell
hace casi 9 años
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Pregunta 1
Pregunta
The space surrounding the nucleus of an atom contains
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electrons
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neutrons
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ions
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protons
Pregunta 2
Pregunta
Which of the following is a use of radioactive isotopes?
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can determine the ages of rocks and fossils
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used as "tracers" to follow the movements of substances within organisms
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can be used to treat cancer and kill bacteria that cause food to spoil
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all of the above
Pregunta 3
Pregunta
Which of the following makes up a molecule of water?
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one atom of hydrogen and one atom of oxygen
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two atoms of hydrogen and one atom of oxygen
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one atom of hydrogen and two atoms of oxygen
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one atom of sodium and one atom of chlorine
Pregunta 4
Pregunta
Which of the following statements about a compound is true?
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Only the chemical properties of a compound are usually the same as those of the elements from which it is formed.
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The physical and chemical properties of a compound are usually very different from those of the elements from which it is formed.
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Only the physical properties of a compound are usually the same as those of the elements from which it is formed.
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The physical and chemical properties of a compound are usually the same as those of the elements from which it is formed.
Pregunta 5
Pregunta
What type of electron is available to form bonds?
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covalent
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nucleus
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valence
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ionic
Pregunta 6
Pregunta
What type of ion forms when an atom loses electrons?
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positive
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possibly positive or negative
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neutral
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negative
Pregunta 7
Pregunta
The most abundant compound in most living things is
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sodium chloride
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water
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sugar
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carbon dioxide
Pregunta 8
Pregunta
When salt is dissolved in water, water is the
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solute
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solution
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reactant
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solvent
Pregunta 9
Pregunta
A substance with a pH of 6 is called
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neither an acid nor a base
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an acid
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both an acid and a base
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a base
Pregunta 10
Pregunta
The three particles that make up an atom are
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neutrons, isotopes and electrons
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protons, neutrons and isotopes
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protons, neutrons and electrons
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positives, negatives and electrons
Pregunta 11
Pregunta
The nucleus is made of
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protons, neutrons and electrons
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electrons and neutrons
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protons and neutrons
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protons and electrons
Pregunta 12
Pregunta
Isotopes are atoms of the same element with the same number of protons and
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the same number of neutrons
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a different number of molecules
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a different number of neutrons
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a different number of electrons
Pregunta 13
Pregunta
Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
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isotope
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compound
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enzyme
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nucleus
Pregunta 14
Pregunta
Water molecules are polar, with
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the oxygen side being slightly negative and the hydrogen side being slightly positive
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the oxygen and hydrogen sides being slightly positive
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the oxygen side being slightly positive and the hydrogen side being slightly negative
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the oxygen and hydrogen sides being slightly negative
Pregunta 15
Pregunta
A solution is a(an)
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evenly distributed mixture of two or more substances
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combination of two or more liquids
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chemical reaction
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breaking of a chemical bond
Pregunta 16
Pregunta
The word "atom" comes from the Greek "atomos" and the Greek word literally means
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to spray a mist
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nucleus
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cannot be cut
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dog particle
Pregunta 17
Pregunta
The atomic nucleus of Helium is made of
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only neutrons
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protons and neutrons
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electrons and protons
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only protons
Pregunta 18
Pregunta
Carbon-14 weighs 14 AMUs. Since Carbon has 6 protons, Carbon-14 must have
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7 neutrons
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6 neutrons
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8 neutrons
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14 neutrons
Pregunta 19
Pregunta
Oxygen has 8 protons, therefore Oxygen atoms will normally have
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14 neutrons
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8 electrons around it
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6 neutrons
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atomic mass of 8
Pregunta 20
Pregunta
An isotope always has
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same number of protons, different neutrons
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same number of neutrons, different protons
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same number of neutrons, different number of electrons
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same number of protons and neutrons
Pregunta 21
Pregunta
Molecules made by SHARING electrons have bonds that are
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metallic
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hydrogenic
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covalent
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ionic
Pregunta 22
Pregunta
According to your reading assignment, the forces that bond two separate molecules together are called _______ forces.
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Van Halen
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ionic
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van der Waals
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intramolecular
Pregunta 23
Pregunta
According to your textbook, if an element steals an electron from a weaker element making them both charged particles that attract each other because of opposite charges, this bonding between the elements is called _________ bonding.
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ionic
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covalent
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Van Halen
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molecular
Pregunta 24
Pregunta
Oxygen atoms are non-metals. Which of the following is NOT true of Oxygen?
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It has 2 openings in valence
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It has only 6 protons in its nucleus
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It bonds ionically with reactive metals
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It bonds covalently with hydrogen
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